Britannica Illustrated Science Library: Birds by Encyclopedia Britannica

Author:Encyclopedia Britannica [Britannica, Encyclopedia]
Language: eng
Format: epub
Published: 2011-10-29T23:50:33+00:00

Its diet consists of:

incubation period is

period, and the

12-15 days

longer than that of

young are

66%

25 hours

invertebrates.

nidicolous birds.

helpless at birth.

6 days

It performs a few

24

IS THE ESTIMATED TIME THAT IT

The rest consists

4 days

hours

instinctive movements.

Some feathers begin to

TAKES THIS NIDICOLOUS CHICK TO

of seeds and

It can barely raise its

The eyes open. The tips

unfold, the nails are

LEAVE THE NEST.

IS THE MINIMUM AMOUNT OF

flowers.

head to ask for food.

of the first feathers

formed, and the wings

TIME THE BLACK-HEADED DUCK

appear. It performs a

continue to grow with the

NEEDS TO BE READY TO FLY.

few movements.

body. It can stand up.

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