Made by Cornell Lab of Ornithology
It is both a birder handbook and an incredible tool for identifying birds from pictures, sounds and step-by-step questions.
I enjoy learning more about local birds in my area or when I travel. It is completely free and without ads
this is worthy of celebration: the lack of video—autoplay video, noisy inane video, panicky video, algorithmic, dumb video, rabbit hole video, any video—on pi.fyi is a good thing
