Bird species that have relatively long incubation periods and short nestling periods for their body size have higher concentration of androstenedione than those species whose developmental time is ...

Cornell University researchers Stephanie Correa, Elizabeth Adkins-Regan and Patricia Johnson have published a study that found that several bird species use progesterone during the first meiosis to ...

As spring approaches, the world around us becomes a vibrant canvas of life, filled with the chirps and flutters of wild birds nurturing their young. It’s a profoundly moving sight, a reminder of the ...