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Illustration incorporating lots of animals found in the African tropical rainforests of Ghana including monkey, hornbill, sunbird, bongo, jaguar, sunsquirrel, driver ant, pangolin, and moniter lizard

Vertebrate embryos comparing growth forms in chart form

Stylized diagram of the duck egg showing chalaza, yolk, white, germination, membranes, and air pocket

Mallard duck Anas platyrhynchos female with four inquisitive ducklings, pen and ink drawing with the mother duck facing right and the four ducklings busy exploring behind her.

Dipper eating aquatic invertebrate

Stylized diagram of the development of a duck egg from being laid until after hatching Day one yolk held in place with chalaza, germinal disc where fertilized chick starts to grow

Stylized diagram of the development of a duck egg from being laid until after hatching day twelve feathers start to show eye covered with lid claws formed

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

Barn owl Tyto alba peering out from barn rafters

Black Casqued Hornbill Ceratogymna atrata