Charms of small males may collapse a Darwin’s finch species
Mating rules may be changing for one of the storied Galápagos birds
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/02/sm_finch.jpg?fit=860%2C460&ssl=1)
TELL DARWIN Crossing species lines and mating with the small tree finch (yearling shown) may be the undoing of a second species of Darwin’s finches in the Galápagos Islands.
Frank Sulloway