Both usually produce few young at one time, and ensure their survival by caring for them. Unlike mammals, birds lay eggs and initial stages of development occur outside the mother’s body. Reproductive ...
Photograph by TUI DE ROY, MINDEN PICTURES During a courtship display, each male seeks to outdo the others with one body part ... of Nature ranks the bird “least concern,” but invasive species ...
Using a common backyard bird, the Northern cardinal (Cardinalis cardinalis), a new study provides the first-ever description of how a wild bird's microbiome relates to its ornamentation and body ...