Bearded Vultures are most commonly monogamous, and breed once a year. Sometimes, especially in certain areas of Spain and France, bachelor lammergeiers will join a pre-existing couple to create a polyandrous trio. Females accept secondary mates as it increases the chances of producing offspring. The birds usually don't lay more than three eggs, so they can use all the help they can get.
Yoooo
Yoooo
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I am loving these strange animals I'm discovering.