Tag Archives: predators

Adorable anoles — lizards with moods!

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Hello, readers — it’s been a while! Time seems to be passing ever faster for me with each new year of life. I was surprised to realize that it’s been a couple months since I posted a blog. So here is a column that I just submitted to a local newspaper with a few more photos than the paper could accommodate.

One of my favorite local reptiles is the Carolina anole (Anolis carolinensis). These cute lizards can be seen year-round since they don’t hibernate. In my experience, however, they seem to be more active — or at least viewable — in late summer and early autumn.

Also known as green anoles, they are the only anoles native to the southeastern United States. Green is nevertheless not their only color. You may encounter dark brown, light brown and green/brown anoles and they might even change their coloring as you watch them.

Unlike chameleons, who change color to blend in with their surroundings so that they can hide more easily from predators, anoles mainly change their skin hues in response to stress or their mood, when they are active or when they want to defend a territory. Darker colors may indicate that they are feeling cold or stressed out.

Sometimes when I’ve watched individuals at length, it’s seemed to me as if they were expressing a variety of moods, even if they didn’t change color.

  

 

Full-grown males are larger than females, but you can also guess their sex based on anatomical features. When males hope to attract a female for mating, they display a brightly colored reddish flap underneath their jaws called a dewlap. When a female sees it, this may induce her to ovulate. Males also show their dewlaps when defending territory against other males.

   

Female anoles can often be distinguished by a row of white markings along their spine, which most males lack.

Like other lizards, anoles regularly shed their skin. Observation last year taught me that they may also eat that skin since this provides them with extra nutrients that may be lacking in their direct environment.

 

Their regular diet is varied, including flies, beetles, spiders, cockroaches, worms, ants, termites, moths and butterflies. Seeds and grains can form part of their meals as well.

    

Carolina anoles are known as arboreal lizards because they spend a lot of time in trees and shrubs. From a higher perch, they can survey their surroundings. Climbing up shrubs and trees can also help them escape from predators who cannot follow them because they lack the sticky foot pads that enable anoles to ascend vertically. Other predators, such as tree snakes and larger lizards, can catch them if they are quick.

 

Sometimes, a predator may catch a green anole by the tail and the anole escapes by dropping its tail—a defensive behavior known as caudal autotomy. A new tail will grow but will be weaker as it contains cartilage instead of bone and often will not be as long.

 

Recently, I learned that birds also hunt anoles when I photographed a blue jay who had caught one. Other birds in our area who go after them include kestrels and bluebirds.

 

The Carolina anoles usually live from about 2 to 8 years. A few who live around my front porch sometimes approach me closely and it’s noticeable that they are watching me, too.

  

Another one decided that an unused bluebird nest box was a good place to hide from predators, obviously not during birds’ nesting season!

It’s been so nice to see the anoles out and about the past weeks. Tonight, we’re having our first freeze of the 2022 autumn/winter season so the anoles may start seeking warm places to hang out. Hopefully, they will have found good places to over-winter.

Readers in the southeast USA who would like information on how to create habitats that can harbor anoles and other native reptiles and amphibians can check out this information site: Reptiles and Amphibians in Your Backyard.

  

My next blog will be the first of a series about Yellowstone National Park. I’d originally planned to post the series this past summer but then couldn’t find some photos I’d taken. The missing card “turned up,” so a photographic tour of the park before it flooded this past June will soon commence.

Have a great day!

Helping monarch butterflies thrive

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If you follow news about nature, you may have come across warnings that the monarch butterfly (Danaus plexippus) has been in rather dire straits for many years now.

 

These lovely orange and black butterflies live from 6 to 8 weeks when they are adults engaged in reproduction. Those who live in the Eastern USA participate in a multi-generational migration process between Canada and central Mexico. The last generation to emerge in late summer is able to delay its sexual maturity to undertake the last leg of the migratory journey (called reproductive diapause) and may live up to 8 months. Individual butterflies may travel as far as 1200-3000 miles to get to their warmer over-wintering grounds.

 

Since the 1980s, the Eastern US monarch population has declined by about 80%, mainly because the only food source for their caterpillars has been disappearing. Milkweeds used to grow abundantly in agricultural areas and along roadsides and ditches, but people have been eradicating the plants from fields and using herbicides and mowing to remove them along roads.

Climate change has also affected the butterflies’ breeding and migratory patterns so that reproduction has been reduced.

One way to help out the monarchs is to plant native (not exotic!) milkweeds in your own yard and any other natural spaces to which you have access. I’ve been doing it around my home and as a volunteer for the Mason Farm Biological Reserve. This year, I was lucky enough to be a beneficiary of a milkweed give-away organized by some local high-school students, so I had two types of the plants in my yard.

 

The ones that I had originally planted were common milkweed (Asclepias syriaca). These plants have large globular clusters of flowers that range in color from pinkish to purple. They do not have blooms their first year but that doesn’t stop the caterpillars from eating their leaves.

 

Butterfly weed (also known as butterfly milkweed; Asclepias tuberosa) is a bit more delicate and “exuberant” in appearance, with small clusters of orange, reddish and yellow flowers. These were the plants that I was gifted by the students and I was happy to see them grow quickly to exhibit their beautiful blooms.

According to Wikipedia, the butterfly milkweed is not a preferred plant for the monarch but this year the butterflies seemed much more attracted to it than to the common milkweed. After a few visits from some butterflies, I began seeing caterpillars and at one point counted 17 crawling up and down the various plants.

They were especially prevalent on the butterfly weed in my front yard and were munching the plants to bare stems very quickly.

 

       

To make sure they had enough food, I transferred some of them to the common milkweeds in my back yard – these were larger plants with much broader leaves and I thought this would ensure their healthy development. Frass (poop) was being left on the remaining leaves and the ground surrounding the plants.

 

It was rewarding to see three caterpillars make it to the chrysalis stage; the other caterpillars crawled away before I could see where they went, and I didn’t find them suspended from any plants. The first one had attached itself to a bare sapling and, unfortunately, the next day it had disappeared, leaving only the silken thread by which it had been suspended.

The caterpillars store milkweed glycosides in their bodies, making them toxic to many other animals. They still have many predators, however, including wasps, spiders, other insects, lizards, toads and mice. I resolved to save at least one chrysalid if I could.

I got to see the second chrysalis being formed (see the video, which is a little shaky at times). When the caterpillar is ready to undergo the pupation stage, it attaches itself to a plant stem by making a silk pad as an anchor (called a cremaster). Then it inserts the hooks at the end of its abdomen into the pad and hangs down. When the caterpillar forms a J shape, this signals the change to a chrysalis will soon be underway.

Starting from the head, the outer skin is shed, rolling up as the new covering develops. The shed skin may remain at the silk pad or fall off.

 

Slowly the stripes of the caterpillar disappear, and the chrysalis takes on a shiny even green hue, with some golden accent spots.

 

I kept that chrysalis, as well as a third one I saw the next morning, in my house and waited for them to darken. This signals the butterfly is almost through developing inside.

One morning I found the newly emerged monarch from the second chrysalis drying its wings. I took it outside so that it could fly free and then begin its trip to Mexico. (I also took the third one outside when it darkened but the twig holding it disappeared.)

 

You, too, could contribute to their propagation by planting some milkweed if you have an area for this. Autumn is the best time to plant seeds, but you can try it in the spring as well. Common milkweed typically doesn’t flower during its first year, but butterfly weed will give you flowers in its first season; the latter plants may be slow to emerge at first.

Both of these milkweed varieties are perennials so be sure to remember where you planted them. Common milkweed may spread out with time, while butterfly weed remains where you put it.

 

Other flowering plants will attract the adult monarchs, too, for nectaring, such as asters and lantana.

 

And then sit back next year and wait for the monarchs to arrive, happy in the knowledge that you have contributed to maintaining a favorable environment for their survival.

More ideas on how you can participate in the drive to save this iconic butterfly are detailed on a U.S. Fish & Wildlife Service website: https://www.fws.gov/savethemonarch/