Horsfield's Hawk-Cuckoo Nestlings Simulate Multiple Gapes for Begging
Horsfield's Hawk-Cuckoo Nestlings Simulate Multiple Gapes for Begging
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DOI：
10.1126/science.1109957
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发表时间：
2005-04
期刊：
影响因子：
56.9
通讯作者：
Keita D. Tanaka;K. Ueda
中科院分区：
文献类型：
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作者：
Keita D. Tanaka;K. Ueda
一些亲巢寄生鸟的雏鸟在孵化后不久就驱逐宿主的卵和幼鸟，从而避免了宿主的歧视，同时垄断了父母的照顾。然而，驱逐是有代价的，因为孤独的寄生雏鸟吸引了降低的供应率。在这里，我们描述了一种形式的视觉信号所使用的驱逐Horsfield的鹰杜鹃（Cuculus fugax），以获得足够的食物。当宿主父母运送食物时，雏鸟会在翅膀上向它们展示一个缝隙色的斑点，模拟不止一只雏鸟的缝隙展示。
Nestlings of some brood parasitic birds evict hosts' eggs and young soon after hatching, thereby avoiding discrimination by hosts while monopolizing parental care. Eviction carries a cost, however, because lone parasitic nestlings attract a reduced provisioning rate. Here we describe a form of visual signaling used by the evicting Horsfield's hawk-cuckoo (Cuculus fugax) to obtain sufficient food. The chick displays a gape-colored patch on the wing to the host parents as they deliver food, simulating the gaping display of more than one nestling.