The original birders gave photography a run for its money
nytimes.com
nytimes.com
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/
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.
That Nature study is pretty much all Fermi estimates. Since we're trading questions until you start answering, what is your estimate of house cats in the wild.
Stray cats may have higher density near people but so do song birds because humans feed birds they like to look at. Someone buying 10kg of bird feed a month keeps quite a lot of bird biomass alive.
Or so one could reach with Fermi estimates. I think it should be made clear when you link that study that you meant "a back of the envelope calculation says that x birds were killed" etc. etc. rather than implying there was any rigor to it.
And no you can’t reach 7 billion birds a day killed by humans from an honest fermi estimate. People collect information on birds, making wildly incorrect stuff up quickly contradicts actual information which bounds the potential numbers. Feel free to try or actually come up with any actual estimates that support your point.
If it was easy to show this research was wildly inaccurate someone would happily publish a paper showing the errors. You on the other hand are just trying to hand wave I don’t like this therefore it must not be true which is only making you come off as a fool. No, wishing really hard doesn’t make reality bend to your preconceptions.
https://en.wikipedia.org/wiki/Darwin%27s_rhea#History_of_the...
https://www.nataliarojasart.com/portfolio
This interview has information about how they create their drawings.
https://americanornithology.org/american-ornithological-soci...
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.
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://en.wikipedia.org/wiki/Gould_League
They produced these fantastic art posters for bird identification.