Adult birds are called cocks (male) and hens (female).
Female rabbits are called does, and males are bucks.
The male equivalent of a cow is called a bull. Bulls are adult male cattle that are typically larger and more muscular than cows.
egg, baby, adult bird, and death
A male horse under the age of two years old, is called a Colt. An adult male horse is known as a stallion if he is entire, or as a gelding if he has been gelded.
An adult horse is either a mare or a stallion. A male adult is a stallion, and a female horse is a mare.
A human adult male is called a man.
That would be the ostrich. Big bird indeed. An adult male can weigh around 340 lbs.
An adult male cat is called a tom.
gander
A buck.
An adult male manatee is sometimes called a bull.
This bird name (technically the male name) is spelled 'peacock'.
stud ordog
Female rabbits are called does, and males are bucks.
Spurs
There is no name for a castrated male duck. An intact male duck is called a drake while a female duck is called a duck.
Whydah bird