Polyploidy

The desert-dwelling zebra finch copulates at most 10 minutes after rainfall. (Becker, Breedlove, Crews, and McCarthy 244)

The female rat begins proception with ear wiggling and then hopping and darting if not approached by the male. Although the latter normally works, she controls the pace of intromissions. Such pacing behavior increases reproductive success and is governed by progesterone. Successfully synchronous reproduction results in a progesterone cascade that helps her conceive. (Becker, Breedlove, Crews, and McCarthy 120)

Becker, Jill, S Breedlove, David Crews, and Margaret McCarthy. Behavioral Endocrinology. second edition. Cambridge: Massachusetts Institute of Technology, 2002. Print.