Extra-pair copulation
Videos
Extra-pair copulation is a mating behaviour in socially monogamous species wherein one of the members of the pair breeds with an organism outside the bound pair. EPC in the animal kingdom has mostly b
In tree swallow (Tachycineta bicolor) nests, most broods contain at least one extra-pair egg.
Seychelles warblers (Acrocephalus sechellensis) display effective mate guarding strategies.
Pair of zebra finches: Bird Kingdom, Niagara Falls, Ontario, Canada
Black-capped chickadee nest.
Pair bond
Videos
In biology, a pair bond is the strong affinity that develops in some species between a mating pair, often leading to the production and rearing of young and potentially a lifelong bond. Pair-bonding i
Extra-pair copulation
…extra-pair copulations. One such hypothesis is that males maximize their reproductive success by copulating with as many females as possible outside of a pair bond relationship because their parental investment is lower, meaning they can copulate and leave the female with minimum risk to themselves. Females, on…
Northern gannet pair
Black-backed jackals are one of very few monogamous mammals. This pair uses teamwork to hunt down prey and scavenge. They will stay together until one of the two dies.
Male (left) and female (right) mallard ducks form seasonal monogamous pairs.