Photo by joelsartore | Male Darwin’s rheas are super dads: They build nests, incubate up to 30 eggs laid by different females, and keep hatchlings warm so they grow into happy and healthy chicks like this one. They also aggressively drive off intruders—including the chicks’ own mothers. Explore more than 120 photographs of the youngest animals across the animal kingdom in my new book, Photo Ark Babies, at the link in bio. Photo taken lundi_farm. #PhotoArk