I tend to be lumpy on some of these bird posts. Taxonomy is the practice and study of putting names to things in nature that do not truly have hard boundaries – deciding what does and doesn’t constitute a genus, species, etc. Because law is involved in conservation and law requires extremely specific language, how one practices taxonomy can make a big difference in the survival of a given population of organisms.
This is worsened by the triage mode for ecology, that the interests of all life on earth are secondary to human greed, so we have to decide what are acceptable losses to that greed. Feels like a trolley thing. Trolley will eat everybody and everything, but if you define this one creature as being special enough that the trolley will allow it to exist as an inbred population in petting zoos, it may be spared. Maybe we’re extremely past due to dismantle trolleys.
Wait, I was going to explain lumpy. Lumping is deciding two populations of an organism are not distinct enough to be categorized as separate species. Splitting is deciding that a given population of organisms has sub-groups distinct enough they should be regarded as separate species. This happens at other –more obsolete– Linnaean ranks as well. Where it applies to my posts is that I’m tending to mention more than one species in a go, and as we see with my last post, this can group them by species in a way the animals don’t necessarily deserve. I named my post for glaucous-winged gulls, but will olympic and western gulls get an equal treatment at any point? Unlikely.
Today I split, and let a related species stand apart. I gave feral domestic pigeons a post; now I bring you a wild cousin of theirs that has also become an invasive species in North America – the eurasian collared dove. As part of the human-induced global biotic interchange, they are surely a problem for some precious local species they out-compete. I don’t know enough to say who that is, but they don’t seem very numerous, and they’re shy around humans. I hear them far more than I see them, and I don’t hear them very often.
Eurasian collared doves look and sound similar to mourning doves, but don’t have spots, and they have a black semi-collar around the back of the neck. They even have white tail feather tips accentuated by a band of black, just like mourning doves. We don’t get mourning on this side of the state, so it’s nice to get something similar. In my experience, they spend most of their time very high up in trees, coming down to the ground or low bushes to feed, when nobody is paying too close of attention. They sing like the world’s most pathetic incels, and the sad cooing has a remarkable ability to carry over distance, and penetrate the weatherproofing of my condo – reach me while I’m washing dishes. I love the sound.
I first saw them at my workplace’s old location, in the beautiful suburban fields with sparse tall trees. They were pretty close, but I didn’t get a very good look before they fled to the treetops. Since then, I’ve tracked their call to the tallest trees near my home. They’re around.
Honestly, I don’t have much to say about them, for lack of direct experience with them. They’re new to me. Feel free to drop your hot ECD goss in the comments.
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