Vertebrate genomes are repositories for retrovirus code that was deposited into germ line as inherited endogenous retroviruses during evolution. Researchers now provide new findings about retroviral establishment and distribution among Darwin’s finches.Vertebrate genomes are repositories for retrovirus code that was deposited into germ line as inherited endogenous retroviruses during evolution. Researchers now provide new findings about retroviral establishment and distribution among Darwin’s finches.