Behavioral Isolation — Definition & Examples

A species of penguins gives each other pebbles to attract mates. One population of penguins only mates when presented a black pebble, while another population only mates when presented a white pebble.

One population of narwhals hunts during the day and mates at night, while another population hunts at night and mates during the day.

A species of crab perform a mating dance to attract mates. All the crabs have the same mating dance, and female crabs do not have a preference.

A population of birds only respond the mating call of birds within their own population. They do not reciprocate the mating calls of other populations, even though they are considered members of the same species at this point.