A properly dressed male guppy, with its gaudy blue ... When evolutionary biologist John Endler began studying Trinidad's wild guppies in the 1970s, he was struck by the wide variation among ...

Like guppies, the male Endler’s livebearer is much more colorful than the female. The typical specimen has bold black and orange markings on its body and fins and varying amounts of metallic ...

There may be several evolutionary reasons why female guppies prefer ... it is clear from the research of Endler and other evolutionary biologists that male guppies live in the crossfire between ...