Related terms:
estrus
nest
legs
eggs
mating
embryo
uterus
birds
fertile
hatching
plumage
receptive
genome
abdomen
feathers
courtship
breeders
estrogen
breeding
incubation
habitat
segments
biology
invertebrate
progesterone
subspecies
some species
pregnancy
reproduction
fertilization
Wikipedia sources:
Mating
Bird
Opiliones
Pederasty
Head louse
Estrous cycle
Canine reproduction
Earthworm
House Mouse
Red-tailed Hawk
European Starling
Drosophila melanogaster
Context for words:
copulation
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