8. Different lovebird species build their nests in different ways.
Fisher’s lovebirds (Agapornis fischeri) carry single strips of tree bark in their beaks. Peach-faced lovebirds (Agapornis roseicollis), on the other hand, hide bark in their feathers. Scientists believe that the latter's more complex behavior is an ancestral trait, and have used this facet of lovebird nest-building as an example of the intersection of evolved and learned behavior.