it doent have to have to be the males
body
In the polygymous bowerbirds, the male constructs and decorates a bower or grass, ferns, orchids, or sticks, an there he calls and displays to attract and impress a female. In some adult males the plumage is colorfull, but in others it is uniformaly dull like that of the females; males with colourfull plumage build simple bowers, wheras unadorned males build complex ones. This clearly indicates that bowerbirds represent a transfer from sexual attraction from the males apperence to the structures and decorations.
Males go so far as to steal decorations from eachother. females choose to mate with males with the larger, bettor decorated bowers.
By looking at the types of bowers and the species that builds them one can imply wich may have started first and wichone has evolved the latest. The bower types are court, mat, maypole, and avenue.
Simpleist is the court type, built by the colorfull the tooth-billd bowerbird, and is simply a cleard patch of forest decorated with upturned fresh leaves.
(y'alll like this one) The mat type is built only by the rare Archbold's bowerbird, a large black bird of highland new guinea, witch accumulates a mat of fern fronds on the forest floor decorated with snail shells, beetle wing cases, fingus, charcoal, and other such items, and drapes orchid stems (often flowering) and -rarely- nepanthese stems on the perches above.
The maypole is a hollow stick structure built around one or several sapling stems and decorated with flowers and moss, constructed by the five gardener bowerbirds.
The rest make avaue bowers, simple or conplex structures of verticle stick walls standing on the ground