Courtship: Behavioural patterns
Although bright colours are important for courtship in some birds. other birds have used behavioural patterns to attract their mates. The Satin Bower Bird (Ptilonorhynchus violaceus; Ptilonorhynchidae) bird Australia constructs an avenue of twigs on which he attaches a variety of objects which are either yellow-green, or preferably a shade of blue that closely matches his plumage colour. The nature of the objects collected is unimportant and may include berries, feathers from other birds and even pieces of plastic. These birds are even known to steal desirable objects from a neighbouring nest and certainly mash blue berries with his beak and uses the blue-purple pulp to paint the walls of his bower. With this bower he tries to lure the female bower bird for courtship and copulation.
Bird Courtship Display
The ritualized display of this Ruddy duck is an important step in the formation of pair-bonds. In water fowl such as these, displays are believed to have evolved as extreme exaggerations of day-to-day behaviors such as preening and bathing.