Laura Helmuth on Nostr: Carolina chickadees and black-capped chickadees interbreed where their ranges ...

Carolina chickadees and black-capped chickadees interbreed where their ranges overlap, making hybrid chicks. I hope this is some comfort for birdwatchers (like me) who have a hard time telling them apart https://www.scientificamerican.com/article/hybrid-chickadees-reveal-how-species-boundaries-can-shift-and-blur/