Brood parasitism is a strange and fascinating breeding strategy seen in several hundred bird species.
Migration is one of the most amazing things about birds— their seemingly miraculous feats of orientation and endurance on long-distance, annual flights.
The world's bird species— a total over 10,000— are spread across all seven continents, and across a vast majority of the world’s ecosystems.
A complete understanding of birds requires that we consider their long history on Earth, looking back many millions of years.
