There are three distinct
populations of Orcas (killer whales): Residents,Transients and Offshores.
While our resident British Columbia Orcas
live in groups, or pods, containing 10-25 animals, transient killer
whales travel in smaller groups of 2-5 animals. Each individual pod
is led by a dominant female.
The feeding behaviour is also different: The primary food source of
our resident Orcas is salmon while transients also feed frequently on
marine mammals like seals, sea lions and other whales.

The present resident Orca population in Johnstone
Strait is approximately 200 animals.
The animals are identified by their different dorsal fins and sattle
patches. Photo left.
Little is known about the off shore Orcas. The travel
in pods of 30-60 individuals and are seldom seen in protected coastal
waters.

The picture on the left shows a male with it's large dorsal
fin and the female.
These two Orcas are very likely Transients, travelling in very small
groups hunting marine mammals.
While there are several books and websites available
which provide information about killer whales, we still prefer the more
scientific approach "killer whales" written by John K.B. Ford,
which contains photos and description of almost all resident Orcas of
the Johnstone Strait area.
More information about whale watching
in British Columbia