Always!
A Killer Whale (Scientific name: Orcinus orca) is not
a whale at all. It is the largest member of the dolphin
family. They are called killer whales because they kill
whales, hunting them in packs like wolves.
Although
they are found in every ocean from the North Pole to
the South Pole, orcas are most common in the Arctic
and Antarctic and are often spotted off the west coast
of the United States and Canada.
The
killer whale is easy to identify by its striking coloration:
jet-black on top with a white patch behind each eye
and a white belly.
Orcas
are very social animals that travel in groups of 5 to
30 orcas, called pods. They have established social
hierarchies which are lead by females. They also have
a complex form of communication with dialects that vary
from one pod to another.
Like
other dolphins, orcas use echolocation (sonar)—bouncing
sound off of objects to determine their location—to
hunt, and use a series of high-pitched clicks to stun
prey. Fish, squids, seals, sea lions, walruses, birds,
sea turtles, otters, penguins, whales, polar bears,
reptiles, and even a moose have all been found in the
stomach contents of orcas.
Orca will intentionally beach themselves to scare seals
or penguins into the water where other killer whales
are waiting to feed.
Size: Although small compared to some
whales, killer whales are the largest predators of mammals
ever known.
Life
Span:
Male orcas have a life expectancy of 50-60 years. Females
have a life expectancy of up to 90 years.
Orcas
are not in threat of extinction. Their only enemies
are human beings.