Pen & Ink

Stylized diagram of the development of a duck egg from being laid until after hatching Day 27 hatchling squashed inside egg ready to hatch, air cell still shows

Stylized diagram of the development of a duck egg from being laid until after hatching day five embryo separates from the yolk, blood vessel network grows and branchesm eye starts to get a colour.

Stylized diagram of the development of a duck egg from being laid until after hatching day eight blood vessels carry waste and oxygen, eyelids start to cover eye, beak and egg tooth more clear.

Stylized diagram of the development of a duck egg from being laid until after hatching duckling hatching half in half out of shell with prominent egg tooth

Stylized diagram of the development of a duck egg from being laid until after hatching hatched duckling chick

Bird bone cross section showing cross bracing for strength and hollow structure

Stylized diagram of the internal organs and anatomy of a duck within a pen outline

Cane toad Rhinella marina