Merlin (bird) this phenomenon is due to the fluctuations of supplementary food stocks discussed above. Merlin (bird) The merlin ("Falco columbarius") is a small species of falcon from the Northern Hemisphere, with numerous subspecies throughout North America and Eurasia. A bird of prey once known colloquially as a pigeon hawk in North America, the merlin breeds in the northern Holarctic; some migrate to subtropical and northern tropical regions in winter. Males typically have wingspans of , with females being slightly larger. They are swift fliers and skilled hunters who specialize in preying on small birds in the size range of sparrows to
Ryukyu wood pigeon of "any" records from Tokashikijima in the Kerama Retto, which, despite being small, has still mostly intact forest cover even today; Zamamijima, where the species is known to have occurred is smaller still and situated farther away from the Okinawan mainland. Ryukyu wood pigeon The Ryukyu wood pigeon ("Columba jouyi"), otherwise known as the silver-banded or silver-crescented pigeon is an extinct species of bird in the Columba genus in the family Columbidae. This wood pigeon was endemic to the Laurel forest habitat. It is an extinct species of pigeon that was endemic to islands in the Okinawa archipelago south-west of