Dressing Up
　　Chimps and humans are not the only creatures/who like to dress up. Some birds add material to their feathers/to change their appearance,/much like humans use makeup. Some vultures rub their heads, necks, and bodies/in iron-rich soil,/which gives them a reddish-brown hue.
　　Bowerbirds in Australia and New Guinea/build elaborately-decorated nests. Male bowerbirds make entrances (or bowers)/leading to their nests,/decorated with shiny stones, charcoal,/and colorful objects of all sorts,/including bottle caps. The bowers attract females,/so, after all,/building them may be a matter of instinct. However,/each bower is unique/and the design changes year by year.