Snow Birds
My title is literal, and not the ironic expression used for people with separate winter and summer homes who avoid the snow. While I could certainly comment on that, it’s actual birds in snow that interest me here. More specifically we will be looking at some of the badass birds that tough it out though the winters in the northern Green Mountains of Vermont. This is a small fraction of the birds that live here in the warmer months. An elite group I would argue, and not in the derisive way of sociopolitical dialogue. No, membership in the community of wild animals that survive, and even thrive in, the northern winters is indeed a meritocracy.
How do they do it? Well, various ways of course, in terms of finding enough food, but certain general features of bird anatomy and physiology are essential. The outer feathers on most birds’ bodies (all in the group discussed here) are waterproof, and the inner feathers, known as down, provide the best insulation on Earth. So, as usual with birds, so much of them is about the feathers. But what about their poor, naked legs and feet? These are kept warm, or at least not frozen, by an incredible adaptation called countercurrent circulation. I won’t get into a technical description, but countercurrent circulation uses close contact between in-going and out-going blood vessels to warm the feet without cooling the rest of the body.
There’s my short introduction. So short you didn’t need to skip it, but I’ll bet you did. Anyway, let’s look at some birds!
That’s all for now, folks. I thank you sincerely for your time and attention, for they are our most precious resources. Where we focus our attention determines the quality of our too-brief time in this world, so I hope you found some beauty here, and learned a thing or two. If you’re so inclined I would love to read a quick note about where you are and what some of the winter birds are there. If you’re reading this in the newsletter just hit “reply.” If you’re on my website there’s a comment form right below this. Happy New Year!