Geoffrey E. Hill

This study shows house finches do not use CYP2J19/BDH1L to produce red plumage, suggesting an alternative pathway for 3-OH-echinenone synthesis.

The paper identifies genetic loci underlying bill color variation in long-tailed finches, showing that yellow alleles arose and introgressed into a red subspecies under natural selection.

This study shows that captivity in cages reduces red carotenoid circulation and increases mitochondrial respiratory rates in house finches, supporting a link between carotenoid metabolism and mitochondrial function.