This video is glorious: youtube.com/watch?v=ihla4r
Walnut is a crane who fell in love with her keeper. They do mating dances together, he helps her build their nest, and she lets him artificially inseminate her.
The twist: he's doing that with other female cranes.
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And the accompanying article is also full of wonderful tidbits, like this:
washingtonpost.com/news/style/wp/
