Deeper Dive Archives | Wild Orca

A small suction cup tag attached to an orca.

December 29, 2022

Vessel noise interrupts prey-hunting orcas, especially females

2 Orcas swimming beneath the surface.

November 21, 2022

Prey shortage indicated by changes to orcas’ body condition

2 Southern Resident killer whales swiming side by side.

October 28, 2022

Salmon scarcity, not timing, explains absent orcas

A group Chinook salmon smolts swimming in clear water.

July 19, 2022

Fewer, smaller Chinook salmon in the Salish Sea provide less calories to endangered orcas

A Southern Resident killer whale surfaces in choppy water in the Strait of Juan de Fuca.

June 15, 2022

Hormone levels indicate stress levels of endangered orcas

3 Southern Resident killer whales porpoise through the water.

May 26, 2022

Scientists’ model turns clock back, then forward to understand human impacts on orcas

4 Southern Resident killer whales surface near a recreational boat.

April 13, 2022

An increase in vessel distance reduces endangered orcas’ exposure to harmful emissions

a group of Southern Resident killer whales swimming tightly together.

April 4, 2022

Why a Strong Social Network Improves Survival Rates of Male Southern Resident Killer Whales

A group of Southern Resident killer whales swimming with a calf.

March 25, 2022

Prey Scarcity Increases Pollutant Levels, and Their Effects, in Southern Resident Killer Whales

A Southern Resident killer whale spyhopping.

February 19, 2022

How Much More Evidence Does NOAA Fisheries Need to Save Southern Resident Killer Whales?

Support our Work

Subscribe