An avian buffet appears!

In the town where I live, there is a private lake in a neighborhood of single-family homes. The little body of water was created by developers who dammed a local creek; now a neighborhood association levies annual fees for use of the lake for swimming, fishing and boating. In the past month, the neighborhood residents were surprised by an influx of birds that they do not usually see and some photos of the new avian visitors began circulating.

Given my interest in wildlife and birds, some colleagues passed on a couple of photos to me and one couple kindly invited me to come visit so that I could see the new arrivals in person. They were especially curious about the identity of a few ducks. When I arrived, no ducks were in sight, but at least 80 double-crested cormorants (Phalacrocorax auratus) were hanging out in crowds on two floating docks.

Their tightly-packed presence had displaced the Canada geese (Branta canadensis), who are more common lake residents. A group of 11 geese were off in the distance on shore leaving the open water to the visiting avian groups.

Some of the cormorants couldn’t fit onto the platforms, so they swam around in the company of the many dozens of ring-billed gulls (Larus delawarensis) of all ages who were swarming the waters as well.

From time to time, the gulls would begin edging their way onto the platforms, eventually taking up space vacated by the cormorants. There are both adult and immature gulls in the crowd.

From time to time, the gulls launch themselves into the air for aerial forays which end in dives down to pick up a fish, of which there still seem to be plenty. This is because the shad population with which the lake was apparently stocked is dying off as a whole.

Why is this happening? I don’t know the species of shad with which the lake was stocked, but it appears that threadfin shad (Dorosoma petenense) are common in the Southeastern USA and often introduced as forage fish for the bass and catfish that fisher-people seek. The shad are very sensitive to changes in water temperature; when it goes below about 42° F (5.5° C), they expire. In the past 6 weeks, we had an unusual early winter storm with about 8-11 inches of snow, followed by days and days of cold rains. Sometimes, it is cold 24 hours long; other days have nights and dawns below freezing and then afternoon temperatures of 50-60° F (10-17° C). The shad die-off is a result.

  

The newly arrived birds are obviously enjoying the easy pickings. When the gulls drop down to snatch a fish, they are almost always pursued by other gulls who try to make them drop the prize.

 

Even when they alight with a fish firmly held in their beaks, other gulls harass them in an attempt to make them give up the meal.

 

  

The shad often appear to be too large for the gulls to swallow. I saw several gulls try to position them to get them down their gullets but the fish just wouldn’t go down. So they drop the fish in the water and then try to pick off pieces for easier eating, while fending off neighboring gulls.

  

It is unclear to me how the birds who don’t usually populate the lake in winter knew that a spontaneous buffet had appeared. In addition to the cormorants and gulls, a group of seven bald eagles (Haliaeetus leucocephalus) was also fishing when I visited. There were some almost full adult eagles (with mostly white heads and tails) and several immature birds of varying ages (eagles reach maturity at 5 years of age). I guess that they came over from Jordan Lake, which is quite a fair distance away. Searching the Internet has not yet given me an answer to this question.

I didn’t see the eagles harass gulls who had gotten a fish but they were very carefully watching one another. When the eagle below managed to get a snack, other immature eagles closely followed him/her. A sub-adult who got a fish was harassed by an immature bird as well.

 

The eagles soared overhead and were joined at one point by a beautiful red-tailed hawk (Buteo jamaicensis). The larger raptors let the hawk fly alongside them with no problem.

It was quite a chilly morning when I got to see the visiting aquatic birds, so I only stayed a short time. But my friends invited me to return for another visit, which I hope to do soon as there is no telling how long it will take the visiting birds to eat the easily available shad. And the ducks? I was able to get one rather indistinct photo of a threesome across the lake and helpful folks in a Facebook group confirmed my guess – they are ruddy ducks (Oxyura jamaicensis). Maybe I can get a decent photo of them next time. 🙂

Winter mornings at Jordan Lake

Mist on the lake I77A5266© Maria de BruynSpending two cold early mornings at Jordan Lake the past couple weeks reinforced my conviction that getting out into nature is a restorative and calming activity. And it doesn’t need to be warm. Although a doctor pronounced me healed after my recent hospitalization and home treatment, it turns out that I’m not completely healthy after all. Starting a new treatment was a bit stressful, but seeing the birds at the lake was a joy.

snag I77A6203© Maria de Bruyn res

Mind you, I’d love to see other wildlife there, but the mammals, reptiles and amphibians have been hiding out or keeping away from areas frequented by people. The fact that it is still hunting season probably makes some of them somewhat shy, too. I did manage to see a fly on one morning though.

fly I77A2979© Maria de Bruyn

The animals do leave behind signs of their presence, however. Tracks in the sand is one give-away that they passed by.

animal tracks I77A2998© Maria de Bruyn res

The beavers (Castor canadensis) leave behind distinctively gnawed tree stumps – and here you can also see one tree that they haven’t quite finished felling yet.

beaver tree I77A2933© Maria de Bruyn res beaver tree I77A2950© Maria de Bruyn res

The shoreline vegetation was decorated with gull feathers in various areas of the lake.

bird feather I77A2711© Maria de Bruyn res bird feather I77A2697© Maria de Bruyn res

heron track I77A2924© Maria de Bruyn res

 

A sandy track of what I assumed was a great blue heron (Ardea herodias) didn’t produce a bird at that site, but I saw these beauties in flight at two other sites.

 

great blue heron I77A3926© Maria de Bruyn res

great blue heron I77A2558© Maria de Bruyn res

At one area, I spotted a bird that seemed unfamiliar just as it was turning to take off. Friendly birders online identified it as an American pipit (Anthus rubescens), the first time I had seen this species (known as a “lifer” among the birding crowd). The next week I saw a killdeer (Charadrius vociferous) in the same spot but got a better shot.

American pipit I77A2526© Maria de Bruynkilldeer I77A5908© Maria de Bruyn

The killdeer didn’t hang around too long either, but I was able to get a couple of nice flight photos this time.

killdeer I77A5933© Maria de Bruyn res killdeer I77A5931© Maria de Bruyn res

American crow I77A2810© Maria de Bruyn res

 

The American crows (Corvus brachyrhynchos) were foraging in the shoreline woods, while the song sparrow was looking for food among the woody detritus left at lakeside.

 

song sparrow I77A5877© Maria de Bruyn res song sparrow I77A5866© Maria de Bruyn res

In another place, the crows were very loudly making their presence known – it turned out that a red-tailed hawk (Buteo jamaicensis) was perched nearby and they were making sure everyone knew the hawk was there.

red-tailed hawk I77A3850© Maria de Bruyn resAmerican crow I77A3878© Maria de Bruyn res

In the trees near the lake, various birds could be seen: the ruby-crowned kinglet (Regulus calendula) was very busy as usual, flying from a sweet gum (Liquidambar styraciflua) to other trees in rapid succession.

ruby-crowned kinglet I77A5662© Maria de Bruyn ruby-crowned kinglet I77A6049© Maria de Bruyn

At one site, there were many dark-eyed juncos foraging on the ground and taking pauses in the trees and shrubs around. Juncos are actually a type of sparrow and a group of sparrows is known by several names: a crew, a flutter, a meinie, a quarrel and an ubiquity.

dark-eyed junco I77A2838© Maria de Bruyn dark-eyed junco I77A2379© Maria de Bruyn

The downy woodpeckers (Dryobates pubescens) and red-bellied woodpeckers (Melanerpes carolinus) were in evidence at various lake sites.

downy woodpecker I77A2504© Maria de Bruyn resRed-bellied woodpecker I77A5384© Maria de Bruyn res

Overhead, the double-crested cormorants (Phalacrocorax auritus) flew by; they would land and share space with the ring-billed gulls (Larus delawarensis).

 

double-crested cormorant I77A2731© Maria de Bruyn resring-billed gull I77A3558© Maria de Bruyn res

ring-billed gull I77A2389© Maria de Bruyn res

 

The ring-billed gulls were numerous and occasionally one swooped down to fish not too far from shore.

ring-billed gull I77A5489© Maria de Bruyn resring-billed gull I77A5497© Maria de Bruyn res

While I was watching, the horned grebes (Odiceps auritus) were more successful in getting meals as they dove into the cold water.

Horned grebe I77A3662© Maria de Bruynhorned grebe I77A3094© Maria de Bruyn

belted kingfisher I77A4014© Maria de BruynA couple times I was very surprised by a bird that suddenly seemed to emerge out of nowhere to fly over my head or just in front of me. That was the case with a beautiful male wood duck (Aix sponsa) and a belted kingfisher (Megaceryle alcyon).

 

wood duck I77A3719© Maria de Bruyn res wood duck I77A3718© Maria de Bruyn res

bald eagle I77A3030© Maria de BruynAn adult bald eagle (Haliaeetus leucocephalus) soared by just as I was approaching an observation platform in one area; the distance and height were considerable but I managed a shot. A Bonaparte’s gull (Chroicocephalus philadelphia) flew by a little lower, while a Carolina chickadee (Poecile carolinensis) sat still for a portrait.

 

Bonaparte's gull I77A3962© Maria de Bruyn

 

Carolina chickadee I77A5806© Maria de Bruyn res

My last avian companions during my latest lake walk were a white-throated sparrow (Zonotrichia albicollis) and a lovely hermit thrush (Catharus guttatus).

white-throated sparrow I77A6115© Maria de Bruynhermit thrush I77A6165© Maria de Bruyn

I returned home on both occasions a satisfied birder!