The term 'bird eggs, study of' can be summarized as oology, which is the scientific study of bird eggs. Oology is a branch of ornithology, which is the scientific study of birds. Oologists study the physical characteristics of bird eggs, such as size, shape, color, and markings, as well as the behavior of the birds that lay them. They also study the ecology of the birds and their habitats, and the conservation of endangered species. Oology is an important field of study for understanding the biology of birds and their populations.