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Like a nightclub, Great Snipe leks see their share of aggravation. Testis volume increased significantly with the size of the breeding colonies a bird had used in the past. Males are more likely to repel clingy exes if there are a lot of other females around.

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Animal Sex: How Birds Do It

In tits, this period varied from about 10 to 77 seconds, mostlv seconds. They concluded that the mechanism of last-male precedence does not appear to be due to the stratification of spermatozoa within the tubules. Thus the female has the potential to determine the sex of her young by whether she ovulates male or female eggs. If the ovum is mature, it's already equipped with yolk, the yellow part of the future egg.

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Can they do it in the air? Antioxidants also protect passively-acquired antibodies IgY; see above against break-down. After an egg is laid, some of these sperm may move out of the tubules into the lumen of the tract, then migrate farther up to fertilize another egg.

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