Post by Sebbe on Jan 3, 2014 23:26:37 GMT
The Iwo Peregrine Falco peregrinus furuitii (Momiyama, 1927) is listed as extinct on the Checklist of Japanese Birds (7th ed.) published on 15th September, 2012 by the Ornithological Society of Japan (http://www.birdforum.net/showthread.php?p=2721216).
It should be noted that the name of this taxon has a somewhat unclear history (See 6 May 2013 update on the IOC site www.worldbirdnames.org/updates/update-diary/; www.birdforum.net/showthread.php?p=2721216).
The population on the Iwo Islands was first discovered by the German bird collector Mr. Holst on Iwo Jima in 1889 and the last specimen was obtained on Kita by Tokuutaro Momiyama in 1937, no Peregrine falcons has been observed in the Iwo Islands during the breeding season since at least 1945 (King, 1981; White et al., 2013). Repeated surveys in the Iwo Islands during the summer months have all failed to record Peregrine falcons (including surveys in June 1982, February 1996, June 2007, January 2008, June 2008 and June 2009), peregrine falcons have been seen in the Iwo Islands during the winter, race not determined but most probably involving migrating birds of another race (White et al., 2013).
Hume & Walters (2012) lists it as rediscovered on Kita Iwo Jima during the early 1990s, apparently based on White et al., (1994 = HBW Volume 2).
But based on White et al., (2013) Falco peregrinus furuitii (Momiyama, 1927) should be considered extinct. This book (Peregrine Falcons of the World, published by Lynx Edicions in November 2013) contains a lot more information about this subspecies including some interesting photographs of stuffed specimens (adult males and juveniles) held in the collections of the Yamashina Institute of Ornithology (31 specimens obtained by Tokuutaro Momiyama between 1921 and 1937).
It should be noted that the name of this taxon has a somewhat unclear history (See 6 May 2013 update on the IOC site www.worldbirdnames.org/updates/update-diary/; www.birdforum.net/showthread.php?p=2721216).
The population on the Iwo Islands was first discovered by the German bird collector Mr. Holst on Iwo Jima in 1889 and the last specimen was obtained on Kita by Tokuutaro Momiyama in 1937, no Peregrine falcons has been observed in the Iwo Islands during the breeding season since at least 1945 (King, 1981; White et al., 2013). Repeated surveys in the Iwo Islands during the summer months have all failed to record Peregrine falcons (including surveys in June 1982, February 1996, June 2007, January 2008, June 2008 and June 2009), peregrine falcons have been seen in the Iwo Islands during the winter, race not determined but most probably involving migrating birds of another race (White et al., 2013).
Hume & Walters (2012) lists it as rediscovered on Kita Iwo Jima during the early 1990s, apparently based on White et al., (1994 = HBW Volume 2).
But based on White et al., (2013) Falco peregrinus furuitii (Momiyama, 1927) should be considered extinct. This book (Peregrine Falcons of the World, published by Lynx Edicions in November 2013) contains a lot more information about this subspecies including some interesting photographs of stuffed specimens (adult males and juveniles) held in the collections of the Yamashina Institute of Ornithology (31 specimens obtained by Tokuutaro Momiyama between 1921 and 1937).
