Matt Simon
March 11, 2015
Wired Science
 
Being on the way to becoming a new species isn’t the same thing as actually speciating. Actual speciation without isolation is quite rare, and even the Santa Cruz Island jays have not actually speciated, and may never even do so. But the implications for long-held evolutionary principles are intriguing. Darwin’s famous Galapagos finches certainly prove that isolation leads to speciation, but now it may be that isolation isn’t always necessary to get species to diverge.
 
 

An acorn-eating island scrub jay. Another population of the species specializes in attacking pine cones, and accordingly has a differently shaped bill., Katie Langin,
 
 

 

 
 
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