The study shows that bird mothers can adjust egg size depending on their social conditions. This counters the idea that, with more help, mothers lay smaller eggs.
The study shows that bird mothers can adjust egg size depending on their social conditions. This counters the idea that, with more help, mothers lay smaller eggs.
The young birds are then hatched there. Weaver birds, like these village weavers in Uganda, impress females with an airy nursery. The entrance is located at the bottom of the cleverly interwoven ...