White-naped cranes are one of the world's most endangered species.
suitor (女性的) 求婚者；追求者
Two male crane suitors have been found dead, with their bellies sliced open by her sharp claws.
My suitors are waiting in line from here to France.
Birds may imprint on humans.
keeper (动物园) 饲养员
The crane fell in lover with her keeper.
He is a very experienced keeper.
As the keeper, one important duty of Crowe is getting Walnut to reproduce.
I don't want to live in a society where women are defined by their ability to reproduce.