Interbreeding two different species of lovebirds produces offspring that are unable to build a nest after they mature because they lack the appropriate nest- building behavior needed to build a nest. This limits genetic mixing between the species due to

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Behavioral isolation occurs when two species have differences in mating behaviors or other behaviors that prevent them from interbreeding successfully. In this case, the offspring lack the necessary behavior to build nests, which is a form of behavioral isolation.

Interbreeding Two Different Species of Lovebirds Produces Offspring That Are