Natural History Wanderings

The New York Times reported that 10 percent of the world’s 10,000 bird species at least one time. The most common hybridization occurs between closely related species such as ducks or gulls. It is even possible but much less likely for a bird from one genus to mate with a bird from an altogether different genus.

Hybrids often die young. Those that make it to adulthood are often sterile or have trouble attracting mates.

Read more at:  Does Bird Mating Ever Cross the Species Line? – NYTimes.com.