Writing for Audubon.org in 2017, Kenn Kaufman looked at the boggling mating strategies of the white-throated sparrow (Zonotrichia albicollis), which comes in two morphs: one with black-and-white head stripes, the other with brown-and-tan stripes. “Within each gender, white-striped birds are more aggressive while tan-striped birds are more nurturing. […] Nesting pairs consist of one bird from each morph more than 95 percent of the time, but it’s especially interesting to consider what happens on those occasions when two birds of the same morph pair up. In short, it’s likely to be a bad idea.” The next time I see one—they do turn up around here—I’ll have to look more closely.
Nature & Wildlife
Late Summer Mushrooms
We’re adjacent to a living forest, so finding mushrooms on our property is a fairly common occurrence. Less so in dry years, and until late in the summer this was a dry year, to the point that I was making note of the fungi’s conspicuous absence in correspondence. Once the skies opened up, though, it was only a matter of time before the various fungal fruiting bodies made an appearance, as you can see in the gallery above.
I really need to get a field guide: the only mushrooms I can identify are the shaggy manes. Anyone able to ID any of these?
Why Do Birds
Solutions to the bird strike problem I told you about last month proved more complicated than I thought. The simple stickers some of my friends recommended are, it turns out, totally ineffective, as are the silhouettes of birds of prey. What are recommended by websites focused on reducing bird strikes are window markers that create a pattern across the entire window, with ideally no more than five centimetres between the visual elements. Despite the total coverage, the markers apparently don’t impede the view outside, or light transmission, too much.
In the end, we more or less solved the bird strike problem by removing the proximate cause: the bird feeder, which encouraged transient bird flocks, who were not familiar with the surroundings, to stop in for a feed. Now that the feeder is no longer around to attract the finches and other seed eaters, and the migrating birds have moved on to their northern breeding grounds, the birds have done a shift change. The insectivores have taken over—which is handy, because we’ve got a lot of insects for them.
Garter Snakes: Banned in British Columbia
One odd quirk of Canadian reptile law that I’ve known about for a while is that garter snakes can’t be kept as pets anywhere in British Columbia. Not just the three species found in that province—any garter snake. This question just came up on the Facebook Garter Snakes group, which I manage. I did some digging and found the exact laws and regulations that prohibit this. I’m sharing what I turned up here for future reference.
British Columbia’s Wildlife Act regulates wildlife, and wildlife is a term that has a specific definition under the Act: something has to be defined as wildlife (as opposed to controlled alien species, another defined term in the Act) in order for the Act’s provisions on wildlife to apply to it. The Act defines wildlife as “raptors, threatened species, endangered species, game and other species of vertebrates prescribed by regulation.” For that prescribed by regulation part, see schedule A of B.C.’s Designated Exemption Regulation,1 which defines a number of species, not all of which live in B.C., as wildlife. This includes, among other things, all species of garter snake. (Garter snakes aren’t being singled out: the list also includes all true frogs, treefrogs, toads, mole salamanders, lungless salamanders, pond turtles, snapping turtles and softshell turtles. More on that in a moment.)Continue reading…