Hummingbirds are extremely skittish and aren’t easy to see all the time. In fact, it takes a lot of effort to create environments where hummingbirds feel safe enough to frequent throughout the year.

Animal group names highlight a fascinating aspect of animal behavior: From social butterflies to solitary scavengers, virtually all animals gather into groups at some point in their lives.

It’s where they hang out, just like humans have bars and restaurants, around the pool or at the beach. These feathered ...