Scientists have found that multiple hummingbird species have adapted to life at high altitudes in the Andes through distinct genetic mutations that nonetheless affect the same biochemical pathways. This suggests that while the details of molecular adaptation may differ at the amino acid and protein levels, there is predictability in evolution at the level of biochemical pathways.
Click here for original story, Andean hummingbirds take different evolutionary paths to high altitudes
Source: Phys.org