I like them, as there is a fair amount of "variation" in birds (age/season) so the guides with photos sometimes are too exact, and they can't highlight all variations. David Sibley's are what I keep in my bag. (He has a birding basics guide thats pretty good too)
Roger Torry Peterson (RIP) https://en.wikipedia.org/wiki/Roger_Tory_Peterson
has an institute named after him https://rtpi.org/about/
https://en.wikipedia.org/wiki/Darwin%27s_rhea#History_of_the...
We're losing bird species like crazy - mostly due to lose of habitat (the big reason for the quelili as well). We're never going to learn.
https://www.abc.net.au/news/2015-07-24/alice-springs-author-...
Mrs. Mooney has a pie shop —
Does a business but I’ve noticed something weird —
Lately all the neighbors’ cats have disappeared!
- Mrs. Lovett, Sweeney ToddIt doesn’t trace back to a single statistic, multiple independent studies have looked into it. The often quoted 1 billion birds killed is actually below most scientific estimates of around 1.3 to 4 billion: https://www.nature.com/articles/ncomms2380
With domestic cats causing ~31% of the ~2.4 billion deaths and strays making up the majority. You can get similar numbers by ignoring domestic cats and simply look at the stray population and roughly estimate how much meat they need to survive and then compare the percentage of bids vs small mammals caught.
You'll have to ask yourself why this works:
https://www.nature.com/articles/ncomms2380/tables/1
Besides just the fact that the American bobcat's range is all of the continental USA and it can outcompete the domestic cat in the wild for prey easily.
Sort of a natural limitation of science is that any "study" is treated as gospel truth by people not acquainted with the process or the mathematical knowledge required to verify.
I don't even have cats.
Here’s a 2010 estimate of 2,352,276 to 3,571,681 bobcats in the US: https://meridian.allenpress.com/jfwm/article/1/2/169/206731/...
Even low ends of the estimates for US stray cat population is 10x that. The majority of them need to hunt life prey to survive vs handouts, which is mostly small mammals but anyone that’s been around outdoor cats notices the birds are on the menu.
I’ll turn this around what percentage of a wild cats diet do you think are birds? 5% or 15%? You can work out the pounds of meat they need to survive a year and work back to number of birds needed.
https://www.nataliarojasart.com/portfolio
This interview has information about how they create their drawings.
And if anyone lives in their habitat and wants to get a few of them around... they love shelled unsalted peanuts! Costco has them pretty cheap.
https://www.youtube.com/watch?v=84GchnXInb8&t=3903s&ab_chann...
Unfortunately a lot. if they rename stellars jays, for example, it creates a rift in American culture.
https://americanornithology.org/american-ornithological-soci...
https://en.wikipedia.org/wiki/Gould_League
They produced these fantastic art posters for bird identification.