Decrease in North American bird population
Here's an article in which scientists have quantified the decrease in the North American bird population over the last several decades:
https://www.ctvnews.ca/sci-tech/deat...1970-1.4600815
The article is interesting, but I found the last sentence in the following paragraph irritating. It could have been worded so much better and accurately. Just removing the word "even" would have made it more accurate.
"Though the scale of the declines may be staggering, some species -- including raptors and waterfowl -- are actually making gains. That growth is likely thanks to conservation efforts and legislation protecting endangered species. Efforts such as the banning of pesticides and ending raptor hunting have had a measurable impact, said Rosenberg. Even hunters have been involved with efforts to grow populations of certain birds, with the intention of preserving their hobby."