SEATTLE — Researchers have documented that both babies in the southern resident killer whale pods are still alive.

Researchers with the Center for Whale Research, which tracks the southern resident population, photographed both babies Sunday, alive and seemingly well.

That was welcome news in a population of endangered orcas that dropped to just 73 this month, with three adults missing and presumed dead. The southern resident population is the lowest since the end of the live capture era in Washington waters in 1976.

RELATED: Are Northwest orcas really starving? Researchers explore several risk factors

The whales have been on the outer coast all summer, including an unprecedented two-month absence from their summer habitat in the inner Salish Sea, including the San Juan Islands. Spring and summer chinook salmon runs have been so low the whales have not bothered to come.

Orca calves have a 50 percent chance of surviving their first year.

RELATED: Whale poop analyzed to help save endangered orcas

Full coverage of efforts to save Southern Resident killer whales