A new study published in the ornithological journal Ibis has uncovered that for the vast majority of bird species, there are more males than females. The discovery suggests that populations of many of the world’s threatened birds could therefore be overestimated, because scientists often base population estimates on counts of males.  The headline above, cribbed from the BirdLife International article on this topic, may evoke images of lurid avian brothels, but the implication is that introduced predators often kill female birds when they are incubating eggs in the nest.

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Written by Mike
Mike is a leading authority in the field of standardized test preparation, but he's also a traveler who fully expects to see every bird in the world. Besides founding 10,000 Birds in 2003, Mike has also created a number of other entertaining but now extirpated nature blog resources, particularly the Nature Blog Network and I and the Bird.