Författare: Ann Goth

Mound-builders are unique in being the only birds that do not incubate their eggs using body heat; rather, a variety of naturally occurring sources of heat is exploited such as solar energy and the h …

Mound-builders are unique in being the only birds that do not incubate their eggs using body heat; rather, a variety of naturally occurring sources of heat is exploited such as solar energy and the h …