"It was always assumed that V-formation flight was learned from the adult birds. But these guys are all the same age and they learned to fly from a human in a microlight. They learned V-formation flying from each other. National Geographic reports on some of the fascinating intricacies of the V formation observed in migrating birds.
Dennis Hlynsky is a professor of film and animation at RISD whose most recent work, titled Small Brains on Mass, looks at bird behavior, particularly how they interact when flying in groups. To better understand how flying as a flock is achieved, Hlynsky filmed the birds and then stacked the images on the same frame for a set number of frames, the results show each bird’s flight as a trail, but synchronized with the flock. The results are often pure poetry. [more inside]
Nature constantly engineers new and creative solutions to all sorts of problems—turning our stereotypes about sex upside-down along the way.
Staying_On-Topic in r/intelligentanimals posts a huge number of links explaining why Corvids (crows, ravens, magpies, etc) are amazing.