| Polygyny and polyandry are not allowed, and it is forbidden to marry close family and kin members. |
| In the rare mating system called polyandry, the female breeds with several males, which then raise the offspring alone. |
| Most offspring were from monogamous pairs, but a few cases consistent with polygyny by males or sequential polyandry by females were also found. |
| We discuss our findings with respect to proximate and ultimate hypotheses regarding the causes and significance of polyandry in female birds. |
| Most marriages are monogamous, although fraternal polyandry is permitted and is even considered to be prestigious. |
| The polyandry of female Uta may be a strategy to obtain genes to produce both high quality sons and daughters. |
