Like a whale maternity ward, beluga cows and their calves flock to the slightly warmer waters at the mouth of the Cunningham River in Canada’s Arctic. At times, when they were temporarily trapped in river pools by receding tides, scientist Valeria Vergara recorded multiple belugas vocalizing at once. She now suspects they use individual calls suggesting they broadcast their identities.

Like a whale maternity ward, beluga cows and their calves flock to the slightly warmer waters at the mouth of the Cunningham River in Canada’s Arctic. Several times, when they were temporarily trapped in river pools by receding tides, scientist Valeria Vergara recorded multiple belugas vocalizing at once. She now suspects they use individual calls, like names, suggesting they broadcast their identities. (Photo by Brian Skerry)