Avian generations in the making – part 2B: nesting in nature

My last blog looked at birds’ nests in man-made structures and there are plenty of birds who take the opportunity to use such sites. Most birds, however, make their homes out in nature – in shrubs, trees and on the ground. This is a bit of a long blog but I want to share views of different species at work.

There are different types of nests; a few types that we see in North Carolina include:

  • Cavity nests – holes in trees, made by the parents themselves or adopted as a home when birds like the cavities made by others
  • Simple scrapes – these are shallow depressions scratched out on the ground and they may be lined with materials or left to look like the rest of the surrounding ground
  • Cup-shaped nests – these structures are like small bowls and may be lined with materials like those used in nest box nests. They can be made of varied materials – swallows use mud while American robins and other birds use plant materials.
  • Platform nests – these nests are usually quite large and comprise large twigs and small branches
  • Plate nests are a bit similar to platform nests but much smaller and less organized; they may consist simply of a few twigs arranged in a shallow bundle
  • Pendant nests hang from branches.

When birds look for a cavity site, they may seek out a new spot on a tree trunk or investigate already existing cavities. These Eastern bluebirds (Sialia sialis) at Sandy Creek Park were examining one particular hole with interest, but a downy woodpecker was interested as well so there was some rivalry. The female bluebird chose to just sit on a nearby branch while her mate looked at the hole numerous times trying to make a decision.

    

Red-headed woodpeckers (Melanerpes erythrocephalus) excavate larger cavities in tree trunks to raise their broods. They may visit various trees before deciding on a spot.

      

Pileated woodpeckers (Hylatomus pileatus) may use the same holes year after year. They make holes for resting as well as for nesting and often include a “back door” so they can make a quick escape if a snake shows up.

          

Brown-headed nuthatches (Sitta pusilla), like this one at Jordan Lake, can be very industrious in excavating their nest cavities. You can watch them pecking away at the wood of a tree trunk or branch, scattering wood shavings and removing bigger bits of softened wood in their beaks to achieve a hole of the right depth for their babies. (See a short video of one at work here.)

   

I also saw nuthatches making nests on the edges of a farm and near the NC Botanical Garden. The pair working on a nest at the Garden were doing this with a great horned owl on a branch overhead, as well as a red-tailed hawk and crows who were raising a racket. Their presence didn’t bother the little birds; these nuthatches also appeared to have help from a previous year’s youngster willing to help the parents raise the new siblings.

 

 

    

Carolina chickadees (Poecile carolinensis) also dig out small holes in trees and snags.

      

Killdeer (Charadrius vociferous) use scrape nests which may look exactly like the surrounding area; their eggs then blend in really well with the environment and can be difficult to see.

When I first saw this nest suspended from a tree near a bridge, I had no idea which bird had built it. A birding friend had fortunately seen the parent bird fly to the nest – it belonged to a Northern parula like the one shown below (Setophaga americana).

    

I was lucky to see a female orchard oriole (Icterus spurius) collecting nice soft lining materials for its nest this past spring.

         

A red-winged blackbird (Agelaius phoeniceus) was doing the same with cattails – an obviously appropriate source for bird bedding!

       

Mourning doves (Zenaida macroura) and Northern mockingbirds (Mimus polyglottos) make fairly shallow, twiggy nests (“plate nests”). It makes you wonder if eggs ever roll out of them through cracks in the loose, low walls.

   

Many birds make cup nests and spend a good amount of time collecting the materials to produce them. Here you see American robins (Turdus migratorius) gathering grasses – they tend to fill their mouths as much as possible before flying off to the nest-in-the making.

      

Red-eyed vireos (Vireo olivaceus) will also attempt to get several pieces of bark into their beaks before flying back to the home site. The photos here are dark as the bird was deep in shrubs where little light was penetrating.

        

Blue grosbeaks (Passerina caerulea) weave what looks like a cross between a pendant nest and a cup nest; they also add man-made materials such as rags, cellophane, newspaper and bits of plastic.

    

Great blue herons and ospreys are builders of platform nests.The great blue herons (Ardea herodias) carry large twigs and branches to furnish a nest. At Sandy Creek Park they have been using the same tree-top platforms for several years now.

     

Last year, I saw this osprey pair (Pandion haliaetus) build their first nest from scratch; they weren’t enthusiastic about me being in the vicinity and would perch or fly overhead to give me “the evil eye” – sometimes calling to one another to sound the alert that they had spotted me down below.

 

 

This year, they were busy refurbishing the nest – these birds with longer-term mates may use the same nest year after year. Again, they would stop their work to stare me down.

 

The Acadian flycatcher (Empidonax virescens) makes a cup nest that is well-hidden among the leaves of the tree spot it chooses. A friend saw the pair constructing this nest and it was done by the time I visited. It seemed quite a tight fit for mom to sit in while brooding her eggs.

The bird whom I enjoy seeing most during nest construction is the blue-gray gnatcatcher (Polioptila caerulea). These little birds are very active and often don’t sit still for long as they feed in shrubs and trees. When they are busy making a new home though, they take their time to do a good job. First, they locate good locations for the materials they use – leaves, spider web to hold the leaves together and pieces of lichen to cover the outside walls.

      

They affix the lichen carefully to make a really beautiful, compact and elegant little cup. The female then sits in it and moves her body to ensure it gets the right shape and dimensions for her upcoming brooding.

     

The male and female both work hard on the nests and this year I got to see three pairs at work. In two cases, it was lucky I saw them flying to and fro because their nests blended in really well with the tree.

Unlike the cavity and platform nesters, the cup and pendant nesters usually need to build a new nest each year. At the end of the summer, for example, the blue-gray gnatcatcher nest had already deteriorated considerably with the rain and wind, even though it was a fairly calm and dry season.

 

Once the nest is complete, the avian parents brood and feed their babies before fledging and this will be the third part of this series. For now, I leave you with the male and female ospreys as they watch the birdwatcher….

  

Avian generations in the making – part 2A: nesting and man-made construction

Hi folks — today I’d like to share with you some of my observations on the second part of avian reproduction — the process in which birds make a nest and lay eggs. (By the way, if you look up “bird nesting” on the Internet, the search will lead you to a human activity: a shared custody arrangement where children reside in one house and the parents take turns living there with them. In the bird world, some avian parents will actually share a home, such as this very old and enormous sociable weaver nest (Philetairus socius) that I saw in Namibia.)

Females of a few species will deposit their eggs in the nests of another, such as some cuckoos and brown-headed cowbirds (Molothrus ater). Some people dislike cowbirds intensely because of their nest parasitism (the cowbird baby will hatch first and eat all the food or perhaps get rid of the other eggs or babies). I figure that this is how the cowbird evolved – it didn’t make a choice to wipe out other species so I can’t blame or hate the bird for it. But the cowbirds do appear to pick on particular species as involuntary “foster parents” and this may be affecting the success of the other species’ reproduction.

There are two general broad categories of bird nests – those located in or on man-made objects such as nest boxes, atop downspouts, in vehicles, in plant pots and other places and those constructed by birds in trees, shrubs and on the ground (i.e., the natural environment which I will discuss in the next blog so this doesn’t get too long!). When birds make a nest in a “human area”, people will often try to accommodate them, not using the object or vehicle or making the space safer. For example, when American robins (Turdus migratorius) put a nest on one of my downspouts, I covered the rainwater container underneath it so the fledglings wouldn’t drown when they leapt to freedom. (I did it just in time, too!)

Swallows and phoebes will also use human constructions as places to situate their homes. The cliff swallows (Petrochelidon pyrrhonota) gather up mud, making countless trips to wad up small balls of the material to carry back to a place like this pier at Cane Creek Reservoir where they line up their nests in a row.

   

Barn swallows (Hirundo rustica) locate their nests inside, using rafters to place a nest; they may end up sharing space with paper wasps and organ pipe mud dauber wasps (Trypoxylon politum), which doesn’t seem to bother them.

The Eastern phoebe (Sayornis phoebe) may use an inside corner of a patio overhang as a site that is conveniently accessible from outside.

Purple martins (Progne subis) living east of the Rocky Mountains almost exclusively nest in homes provided by people. The hanging gourd nests can be seen in fields but nowadays other types of plastic constructions are also used.

    

In order to attract barn owls (Tyto alba) back to areas where many traditional barns have been razed, people are also placing special boxes in fields with plenty of open space in front of them so that the owls will have a hunting territory adjacent to their front door. Made of heavy plastic, these boxes may be monitored by organized groups in an effort to document their use.

   

At the Mason Farm Biological Reserve, an eagle scout project involved bringing in cranes to attach very large nest boxes to the tops of trees for barred owls (Strix varia) – so far, I have only seen Eastern gray squirrels making use of these nests.

And then there are the nest boxes that people put up to attract Eastern bluebirds (Sialia sialis), brown-headed nuthatches (Sitta pusilla) and screech owls. In my yard, other birds use these boxes, too, including the Carolina chickadees (Poecile carolinensis) such as my one-legged,  banded friend Chantal, Carolina wrens (Thryothorus ludovicianus) who may puzzle about how to get a long twig into the box and house wrens (Troglodytes aedon), who pile up twigs in a rather untidy stack inside the box.

   

   

Chickadees construct lovely mossy nests lined with hair, fur or plant fibers.

      

The nuthatches have nests with bark strips.

    

Sometimes people will intervene when a nest is in danger. A Carolina wren put her nest into a boat at Cane Creek Reservoir that was rented out to people and keeping the nest there was not a good option as she would be missing her nest for hours when the boat was gone. The land manager was so kind as to relocate the nest into a tree right in front of the boat’s resting place; unfortunately, inclement weather caused the nest to dislodge that evening.

   

Another danger may also threaten the birds and their nests – predators. A friend and I found it unusual to see a tree swallow (Tachycineta bicolor) putting a nest in a bluebird box on the edges of a farm. Several days later, we saw a black rat snake (Pantherophis obsoletus) peering out of the box and the swallows were nowhere to be seen.

   

If you can manage to mount your boxes on poles rather than trees, put both squirrel and raccoon baffles on them and also place them away from overhanging branches, they should stay relatively safe from the squirrels, snakes and raccoons. Next up: birds’ nests with no human connections.

 

 

Outwitting the starlings during Winter Storm Helena

white-tailed-deer-i77a4029-maria-de-bruyn-resSo this past weekend, our part of North Carolina dealt with Winter Storm Helena, which brought us 83 straight hours of below-freezing temperatures (e.g., -9C/15F but we had lower) and a need to bundle up really well if venturing outside. (It also brought me a realization that winter storms are being named like hurricanes.) The first morning, when I went out to fill the bird feeders, I didn’t put on gloves or a cap and dealt with hypothermia symptoms when I finally went inside. I had on triple layers after that! The deer had their fur puffed up and seemed to be coping well.

The frigid air made me feel very sorry for the wildlife, although living outdoors is, of course, what they do and what they have evolved to accommodate. (I did hear today, however, of some birds and small animals that were found frozen to death!) With the snow covering the ground, it turned out the birds were more than happy to visit the feeders and piles of food I had strewn on the snow for the ground feeders.

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Not only did I have many types of birds coming round, but also record numbers of them. Some birds, like the yellow-rumped warblers (Setophaga coronata, above), usually tend to visit on their own and are not happy with their species mates in the vicinity but during these days, I had four of them alighting near feeders at a time. The same was true for the colorful pine warblers (Setophaga pinus) although they didn’t come close to each other.

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pine-warbler-i77a2441-maria-de-bruyn-res

The Carolina wrens (Thryothorus ludovicianus) and Carolina chickadees (Poecile carolinensis) don’t seem to have too many problems with sharing space and visited the feeders in the same way they always do – quick flights to and fro from nearby tree and shrub branches.

carolina-wren-i77a3873-maria-de-bruyn-res   carolina-chickadee-i77a2710-maria-de-bruyn-res

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Most of the birds were fairly content to be in close proximity to one another during the snow days. The brown thrashers (Toxostoma rufum) did get very cross with one another, however, when they came too close to one another and chased their rivals away.

Sometimes a bird would go off and rummage in the snow, like this blue jay (Cyanocitta cristata).

 

blue-jay-i77a2776-maria-de-bruyn-res blue-jay-i77a2770-maria-de-bruyn-res

european-starling-i77a2674-maria-de-bruyn-resThe biggest challenge for me was keeping the suet and meal worms in supply, mainly because the European starlings (Sturnus vulgaris) show up in large groups and gulp down food at a speedy pace. The other birds nibble but the starlings seem to inhale food as if they have vacuum cleaners in their throats. They can get grumpy with one another and don’t mind landing atop each other to get a foothold on the feeder.

brown-thrasher-i77a3641-maria-de-bruyn-resI was pleased that the other species of birds are learning to cope with them, no longer being intimidated to fly away when these greedy avians arrive. However, they may get displaced from a feeder just because the bulky starlings take up so much room and never wait their turn to get a spot. The larger birds, like the thrashers and red-bellied woodpeckers, may express their displeasure to the starlings while trying to hold their ground. Other people report common grackles (Quiscalus quiscula) as feeder dominant birds but they are well behaved at my house.

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So, what was I going to do? Some of my feeders are set in a flower garden and I had left the dried stalks of sage, butterfly bush and scarlet mallow standing. They don’t look pretty but the birds love sitting on them near the feeders as they digest a bite before getting another. So I began smearing suet on the stalks, which are not sturdy enough to hold the starlings.

The yellow-rumped warblers and chickadees were pleased, as was my faithful ruby-crowned kinglet (Regulus calendula) and the Carolina chickadee.

yellow-rumped-warbler-i77a3913-maria-de-bruyn-res  carolina-chickadee-i77a4283-maria-de-bruyn-res

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To my surprise, even the larger Northern mockingbird (Mimus polyglottos) and brown thrashers discovered and sampled the suet-laden stalks.

northern-mockingbird-i77a3629-maria-de-bruyn-res   brown-thrasher-i77a3607-maria-de-bruyn-res

Following advice from the Bird Sleuth program, I had stuffed the bluebird and nuthatch boxes with pine needles and wool in case the birds wanted to shelter there overnight. I don’t know if any of them did, but the brown-headed nuthatches (Sitta pusilla) were again checking out their preferred nest box, so perhaps they did roost there overnight.

brown-headed-nuthatch-i77a3959-maria-de-bruyn-res    brown-headed-nuthatch-i77a4183-maria-de-bruyn-res

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I was filling the heated bird bath daily, too, as it became a popular drinking fountain.

The thrill of the wintery snow days for me was a new yard visitor, a gorgeous fox sparrow (Passerella iliaca). I have never had one here before so it was a wonderful surprise and discovery. (I’m still hoping that a red-breasted nuthatch will turn up, too.)

 

 

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The birds “missing” from the storm gathering were the hawks. I’ve had a Cooper’s hawk  (Accipiter cooperii) visiting for years, but recently discovered that a sharp-shinned hawk (Accipiter striatus) is also taking birds from my yard. As they look quite similar, the sharpie may have been coming around for some time and I just never realized it. They were both here in the last couple weeks, but neither one made an appearance during the storm.

coopers-hawk-i77a1341-maria-de-bruyn-res   sharp-shinned-hawk-i77a8520-maria-de-bruyn-res

Our two neighborhood white-tailed does (Odocoileus virginianus) and their three offspring came by, obviously finding my yard a peaceful and safe space to rest.

white-tailed-deer-i77a4432-maria-de-bruyn-res   white-tailed-deer-i77a4431-maria-de-bruyn-res

So I’ll end with some “beauty shots” from the snow days as the snow and ice are now melting. In two days’ time, we are supposed to be having temperatures of 68F/20C or higher! And then we can wait out the rest of January as well as February and March to see if we get any more winter storms.

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White-throated sparrow (Zonotrichia albicollis)

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     house-finch-i77a2852-maria-de-bruyn-res

Chipping sparrow (Spizella passerina)        House finch (Haemorhous mexicanus)

dark-eyed-junco-i77a2590-maria-de-bruyn-res  downy-woodpecker-i77a2810-maria-de-bruyn-res

Dark-eyed junco (Junco hyemalis)          Downy woodpecker (Dryobates pubescens)

eastern-towhee-i77a4111-maria-de-bruyn-res    northern-cardinal-i77a3099-maria-de-bruyn-res

Eastern towhee (Pipilo erythrophthalmus)      Northern cardinal (Cardinalis cardinalis)

blue-jay-i77a2858-maria-de-bruyn-res     eastern-bluebird-i77a2285-maria-de-bruyn-res

Blue jay                                                       Eastern bluebird (Sialia sialis)

red-bellied-woodpecker-i77a4047-maria-de-bruyn-res       ruby-crowned-kinglet-i77a4263-maria-de-bruyn-res

Red-bellied woodpecker (Melanerpes carolinus)     Ruby-crowned kinglet

northern-mockingbird-i77a2714-maria-de-bruyn-res   pine-warbler-i77a2657-maria-de-bruyn-res

Northern mockingbird                                              Pine warbler

 

My nemesis birds!

european-starling-dk7a5386-maria-de-bruyn-resIn the birding world, a “nemesis bird” often refers to a species of bird that is eluding a birder intent on adding to their life list of bird species seen in person. For me, however, a nemesis bird is one that is emptying my feeders and depriving other birds of their bit of nutritional goodness because it descends in such great numbers that no one else has a chance. Which bird is this? It’s the European starling (Sturnus vulgaris), a bird which I admittedly find visually beautiful but rather unattractive as far as temperament goes.

northern-mockingbird-i77a9648-maria-de-bruyn-resOther birders who spend time attracting birds to their yards often comment on how Northern mockingbirds (Mimus polyglottos) chase other birds away – those in my yard feed quite happily alongside other species, however, and even wait their turn for the suet feeders. Another large bird, the brown thrasher (Toxostoma rufum), does the same. In fact, most of the species that visit my yard are content to share feeder space and/or wait their turn.

brown-thrasher-img_9913-maria-de-bruyn-res     sharing-feeders-i77a9154-maria-de-bruyn-res

american-crow-dk7a2281-maria-de-bruyn-resOther species that are called “bully birds” include common grackles (Quiscalus quiscula, below), who can look quite beautiful with iridescent feathers, blackbird species and house sparrows. The grackles and red-winged blackbirds (Agelaius phoeniceus) in my yard have not been too dominant; they do sometimes come in numbers but let other birds near. I haven’t had crowds of grackles lately and when they’ve come, their main concern was to attempt to drive away the American crows (Corvus brachyrhynchos, above), so my main foe has been the starlings.

common-grackle-dk7a2236-maria-de-bruyn-res   common-grackle-i77a1447-maria-de-bruyn-res

They discovered my yard as a buffet about a year ago and introduced their young to the feasting area this past summer.

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What is striking to me is the fact that they not only will “yell” at other species to go away but also compete vigorously with one another for a spot at the platform and other feeders, indicating a rather nasty disposition.

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The young starlings pick up on this behavior quickly.

If I come outside, they quickly fly off and roost high up in the tallest trees; sometimes, they will actually fly off to another place in the neighborhood. Clapping my hands and banging on the window will also get them to leave. However, they stick around to assess whether I will appear and if I don’t come out, they are back in short order.

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Their first love turned out to be the dried mealworms, which are a big hit with the Eastern bluebirds (Sialia sialis), tufted titmice (Baeolophus bicolor), Carolina chickadees (Poecile carolinensis), Carolina wrens (Thryothorus ludovicianus) and pine warblers (Setophaga pinus, left) among other species.

eastern-bluebird-i77a6862-maria-de-bruyn-res  eastern-bluebird-i77a9596-maria-de-bruyn-res

tufted-titmouse-img_4143-maria-de-bruyn-res   tufted-titmouse-i77a9678-maria-de-bruyn-res

carolina-chickadee-i77a9738-maria-de-bruyn-res   carolina-wren-i77a7312-maria-de-bruyn-res

It’s always a pleasure to see the banded birds return, like the Carolina wren below.

carolina-wren-i77a9548-maria-de-bruyn-res   carolina-wren-i77a9547-maria-de-bruyn-res

When five or more starlings gather around a feeder, they literally gulp the mealworms down, making short shrift of a good-sized supply.

european-starling-dk7a0937-maria-de-bruyn-res   european-starling-dk7a2433-maria-de-bruyn-res

northern-cardinal-i77a2061-maria-de-bruyn-resI began putting out only mixed seed, sunflower seeds (Helianthus annuus) and my home-made vegetarian suet, the latter being a favorite for many species: the bluebirds, chickadees, wrens, titmice, yellow-rumped warblers (Setophaga coronata), brown-headed nuthatches (Sitta pusilla), Northern cardinals (Cardinalis cardinalis, left), and downy and red-bellied woodpeckers (Picoides pubescens and Melanerpes carolinus).

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downy-woodpecker-dk7a1967-maria-de-bruyn-res   downy-woodpecker-dk7a1961-maria-de-bruyn-res

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My resident ruby-crowned kinglet (Regulus calendula) hasn’t returned this winter (though I hope he is just late), so he doesn’t have to compete with the much, much larger starlings for his beloved meals.

ruby-crowned-kinglet-img_1776-maria-de-bruyn-res  ruby-crowned-kinglet-dk7a0538-maria-de-bruyn-res

european-starling-dk7a5647-maria-de-bruyn-resTo my dismay, when the starlings discovered no mealworms were available, they decided that suet could be a nice substitute. Oy vey! They manage to empty the suet holders in record time.

I waited to put out the suet until I saw no starlings in any of the tall trees surrounding the yard.

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european-starling-i77a7189-maria-de-bruyn-resThe smaller birds came but this lasted only a little while. Soon the starlings showed up, leading me to think that either “scout” or “watch birds” were left behind to warn the flock when preferred food arrived, or they had a tremendous sense of smell that led them to my yard. It does turn out that starlings use their sense of smell to identify plants for their nests, so who’s to say they don’t use it to find food, too?

 

red-bellied-woodpecker-dk7a1833-maria-de-bruyn-resOne bird advice website recommends avoiding sunflower seeds as “bully birds” prefer them. Well, so far, the starlings have assiduously avoided any seeds. So a couple days ago, I filled all the feeders with seed except for the suet feeders – and I stood outside next to them so that the songbirds could have a go at the suet without their bigger avian neighbors chasing them away. It was gratifying to see the little ones enjoy a bit of suet while the starlings perched high above, unwilling to come down in my presence. Today, it was raining persistently but the songbirds were flying to and fro among the feeders so I put suet in three holders and some mealworms in one.

For an hour or so, they had the dried worms and peanut butter-based treat to themselves; then a starling appeared. I went outside but this particular bird didn’t seem to mind. When three of its compatriots arrived and saw me, they swooped away so the little birds still could grab some suet and mealworms.

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Now I’ll wait to see if the starlings begin eating the seed or finally move on or stay away for longer periods. I’m guessing as long as there is occasional suet, they will leave their scouts in place to warn them when a tasty meal is available. And I do want to put out some mealworms now and again so I don’t disappoint the chickadees and wrens who greet me with loud twittering when I approach empty feeders. Non-birders probably think that’s silly (to put it mildly) but I think bird lovers will understand….

Can you go home again? Apparently so!

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This year, I had the good fortune to see both brown-headed nuthatches (Sitta pusilla) and Eastern bluebirds (Sialia sialis) raise broods in some of my nest boxes. I saw the babies fledge, which was truly an enjoyable event.

 

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For some time, the parents continued feeding their babies after they left home, but eventually they got to the point that they could catch or find their own food. As summer progressed, the parents and children both visited my feeders and it was gratifying to see the families thrive. Then during September and October, I saw a behavior that I don’t remember from years past.

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The nuthatches started to return to their nest box almost daily. They didn’t check out nearby boxes but went to their original home and today they are still visiting there, sitting on top, fluttering around it and looking inside.

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Their frequent visits seem to have intrigued a local tufted titmouse (Baeolophus bicolor) who decided to take a look in their box, too,but that was only a one-time visit as far as I could see.

It’s not only the parents doing this, but also one or more of their offspring. So how true is the saying “you can never go home again” (origin a novel by Thomas Wolfe)? It originally meant that you can’t recapture exactly how things were in your youth because changes take place in situations and places. But people do often journey back to the places where they grew up and apparently birds do, too! Maybe they are wondering if their nest box is still the same good place for a home.

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The bluebirds began doing the same with their home nest box as well. They take turns flying from nearby branches to cling to the box and investigate the now empty dwelling. While the nuthatches just lean and peer inside, the bluebirds eventually go inside for a bit.

 

 

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Oddly, there seems to be some contention involved. For example, when this pair was investigating, they had a little tiff for some reason.

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I can only guess that the birds are checking out the nest boxes in anticipation of next year’s nesting season. The nuthatches and bluebirds will begin breeding again around March, although nuthatches might already begin building a new nest as early as December. It will also be interesting to see if they end up roosting in the boxes during the colder winter nights.

brown-headed-nuthatch-i77a4527-maria-de-bruyn-resWatching the nuthatches and bluebirds nest, fledge and feed is an enjoyable pastime and I’m looking forward to seeing them repeat the process next year. In the meantime, perhaps I’ll continue seeing them around the nest boxes this winter – as Pliny the Elder said, “Home is where the heart is” and something is sure attracting them back! (And yes, I know, that is a bit of anthropomorphizing.)