Animal Groups & Survival

Did you know dinosaurs might have lived in groups too? Scientists found rows of dinosaur footprints stuck in ancient mud, called trackways. When lots of footprints from the same kind of dinosaur point the same way and are the same age, it shows a whole group was walking together at the same time. Just like wolf packs or herds of buffalo today, dinosaurs may have traveled in herds or packs to stay safe. Living in a group can help animals watch for danger from every direction, since more eyes and ears can spot a predator sooner. Some fossil sites even show baby dinosaurs mixed in with grown-up ones, which hints that the group protected its young while they grew. Birds are actually living dinosaurs, and many birds still flock together for the same reasons: safety in numbers and a better chance of finding food. So next time you see geese flying in a V or fish swimming in a big school, remember that dinosaurs may have used that same trick millions of years ago.

Toothed whales, like dolphins, orcas, and narwhals, catch their food by grabbing it with sharp teeth or sucking it straight into their mouths. Many of these whales are not loners. They live and hunt in social groups, sometimes called pods. Living together gives them a big survival advantage. Younger whales learn hunting tricks by watching older, more experienced whales in the pod. Working as a team also makes it easier to catch fast prey like fish and squid, since the group can herd the prey together or take turns chasing it. Being part of a pod can help protect whales too, since the group can watch for danger and even help a hurt or tired member. Orcas are famous for hunting together in pods, and they sometimes teach their calves special hunting moves that get passed down through the family.