That these animals are prepared to
undergo so much to find their food is testament to the nutritional value
of that food - krill. Here snow petrels (and in the first photograph
a crab eater seal too) are taking advantage of a tide crack to fish
through in the case of the birds and to breathe at in the case of the
seal. A tide crack is a long narrow open lead of water that stretches
between two points such as nearby islands or exposed rocks. It arises
when the tide rises and falls, when the tide rises the crack opens when
it falls, the crack closes. Such tide cracks can easily stretch for
several kilometres, but never being more than about 50cm wide.
The snow petrels space themselves out
along the tide crack and sit patiently waiting for a krill to swim by
at which point they jump out and hover just above the surface to take
the tasty morsel.
Paul Ward - Pentax equipment, 100mm
lens, 35mm film, K64.
This picture may not be copied or used in
any manner without prior written permission.