Male bowerbirds build and decorate an entire structure just to get a date

Bowerbirds don't decorate their nests — they build a separate structure purely for courtship, called a bower, then spend weeks arranging twigs, shells, flowers and any bright litter they can find around it, often sorted meticulously by colour. Females tour multiple males' bowers before choosing a mate, judging construction and decoration quality alone; the winning male gets to mate, then plays no further part in raising the young.

— Standard zoological accounts, Bowerbird — Family Ptilonorhynchidae