| Budget Amount *help |
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2002: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 2001: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2000: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Research Abstract |
The horsfield"s hawk cuckoo Cuculus fugax is an obligate broo parasite in Japan and East Asia, which paras* small passerines especially whose plumage is blue, especially to red-flamked bushrobin Tarsiger cyanurus, blue white flycatcher Cyanoptila cyanomelana, and Siberian blue robin Luscinia cyane. We investigated the ecology * hawk cuckoo in Kiyosato, Karuizawa, and Mt Fuji. The chick of horsfield"s hawk cuckoo has vivid yellow gap naked wing-bends of vivid yellow as well. It hangs the wing-bends and shows them off to its host parents comi* feed It has never been reported of the brood parasitic birds to have such a series of queer traits throughout the v* We conducted video recordings and dying experiments to examine the function of wing-bends. In our results, the parents, the red-flamked bushrobin Tarsiger cyanurus, actually tried to feed to the wing-bends by mistake. We di* the liminous condition of host nest environment among four species of parasitic cuckoos In Japan, and suggest the that makes the variation in the host manipulation tactics by parasitic chicks
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