Genetic and acoustic evidence show that the rare Ijima’s leaf warbler (Phylloscopus ijimae) is actually two distinct bird species, including the newly-identified Tokara leaf warbler — both with small, vulnerable populations. The Tokara leaf warbler (Phylloscopus tokaraensis) on Nakanoshima, the Tokara Islands, in June 2017. Image credit: Per Alström / Uppsala University. The Ijima’s leaf warbler is a rare migratory bird species found in...
