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Bowerbirds /ËbaÊÉrbÉrd/ make up the bird family Ptilonorhynchidae. They are renowned for their unique courtship behaviour, where males build a structure and decorate it with sticks and brightly coloured objects in an attempt to attract a mate.The family has 20 species in eight genera.he Ailuroedus catbirds are monogamous, with males raising chicks with their partner, but all other bowerbirds are polygynous, with the female building the nest and raising the young alone. These latter species are commonly dimorphic, with the female being more drab in color.
During the breeding season, the cloaca swells and protrudes slightly outside the body, while during the rest of the year it is much less prominent. When birds are ready to breed, their reproductive organs â the testes and ovaries â swell and produce the sperm and ova.eeing mating birds can be exciting, and it's a great reminder of how special spring birding can be. By understanding how birds mate, birders can better realize what unique behaviors they see in the field and can take steps to protect the nesting birds and their young.