Gannet
Sula
bassana
In
Europe, gannets breed on the coasts of Ireland, England, Scotland, Brittany,
Norway, Ice Land, Faroes and other small island in the area. This is a truly
pelagic species which spend most of its life on the open sea, although young
birds occasionally stray inland. The birds arrive at their breeding grounds
between February and early April,
forming enormous breeding colonies (one, in
the Outer Hebrides, is 70,000 strong), generally on rocky island, on an open,
elevated spot. The nest is made of seaweed, Grass and pieces of wood and there
may be as many as two or three to a square meter. The female lays a single,
thick-shelled egg, which both partners incubate in turns for 39 to 46 days.
Sometimes the chick takes more than a day to peck its way out, and up to
another three days before opening its eyes. Covered With a thin coat of down
and having a fantastic appetite, it is fed by the adult birds day and night,
taking food by thrusting its head right into gannet’s throat. By 11 weeks the
chick weighs a kilogram more than an adult. It abandons the nest at 75 days, as
yet incapable of flight, but able to swim. Sometimes it travels as far as 70 kilometers
from the colony before taking to the air, usually between 95 and 107 days.
Having abandoned the colony, a young gannet must fend for itself, which it does
by catching herring, mackerel and sardines. An excellent diver, it hunts by day
and night.
(Migratory bird)
Size of egg
|
62.0-87.5X41.0-54.0 mm
|
Length
|
91.5 cm. Male and female have similar plumage.
|
Voice
|
Usually a barking sound ‘arrah’ and similar
noises.
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