New pictures show how Bigg's killer whales are thriving, even as southern resident population declines

Simon Pidcock has been watching whales for the past 17 years.

In all that time, he's never seen anything like what he witnessed last Sunday off B.C.'s Sunshine Coast.

"[It] was one of those amazing days that we all live for," said Pidcock, owner ofCowichan Bay-based Ocean Eco Ventures.

An estimated 41 Bigg'skiller whales were socializing together in the Salish Sea, right in front of Pidock's boat.

Bigg'skiller whales also know as transients are the mammal-eating cousin to the southern resident killer whales, which only feed on fish. There are reportedly around 400 Bigg'skiller whales currently in our waters, according to the Georgia Strait Alliance.

Pidcock says Bigg'skiller whales have been thriving in recent years, with more than 70 documented new births.He says on Sundayhe even spotted three "brand new little calves"splashing about.

"We always love it when we have encounters like that,"Pidcocksaid.

Change in feeding patterns

Pidcock says it's a good-news story, despite the stark contrast to the population of B.C.'s southern resident killer whales, which stands at just 74.

He says 12 years ago, he'd rarely see any Bigg'skiller whales in the Salish Sea.

"Ninety per cent of my time would have been spent with southern residents and about 10 per cent with the Bigg'skiller whales," said Pidcock.

"We've actually done a full 180-degree switch."

He says this has to do with changing feeding patterns.

Southern residents are now spending more time on the western coast of Vancouver Island, where salmon is more abundant, while Bigg'skiller whales have been able to find plenty of food in the SalishSea, especially pinnipeds like seals and sea lions.

"The Salish Sea has one of the largest populations of pinnipeds in the world and it's basically a big smorgasbord for [the killer whales]," said Pidcock.

"So, they're healthy. They're robust."

As for the endangered southern residents, their population size is currently at a 30-year low after three deaths in 2018.

Earlier this year,scientists predictedtwo more of themwho are currently in poor physical condition willprobably be dead by summer.

Yet, Pidcockis hopefulthat nature and man will give the southern residents a fighting chance forsurvival.

"We're cautiously optimistic that we could see a change for the southern residents in that their numbers come back," he said.