Hinh thanh Trung

Chapter 1: Avocet Produces Her Egg

Importance of Egg Protection

• For birds, safeguarding their eggs is a top priority.

• Eggs are viewed as treasured offspring by the parents.

• Eggs are also a target for other animals, which see them as a tasty snack.

The Miracle of Egg Formation

• Eggs are created from a microscopic egg cell attached to a yolk globule.

• The process begins in the egg duct where the egg is fertilized by sperm stored in the duct.

• This fertilization occurs as the egg passes through the duct.

Development of the Egg

• After fertilization, the fertilized egg enters the lime-producing section of the duct.

• Over the next 24 hours, a hard shell is gradually formed around the egg.

• The process ends with a pigment gland adding spots of color to the eggshell.

Result

• This intricate process results in the eventual laying of the avocet's egg.