Humber Jessica M, Brodbeck David R, Warkentin Ian G
Environmental Science Programme, Memorial University, Corner Brook, NL A2H6P9, Canada.
Behav Processes. 2009 Mar;80(3):233-7. doi: 10.1016/j.beproc.2008.12.009.
Pine siskins (Carduelis pinus) frequently forage at known high quality food supplies such as backyard feeders. In this field study, pine siskins visited backyard feeders of differing colour and spatial position. The three feeders contained varying amounts of food in a ratio of 3:2:1. The birds quickly distributed their visits in this ratio to the three feeders. During unbaited tests, two feeders on a given day had their positions swapped. The siskins appeared to primarily use both large-scale spatial or distal cues when foraging as well as local colour cues.
松雀（黄雀属）经常在已知的优质食物供应源觅食，比如后院的喂食器。在这项实地研究中，松雀光顾了颜色和空间位置各异的后院喂食器。三个喂食器中的食物量不同，比例为3:2:1。鸟儿们很快按照这个比例将它们的光顾次数分配到了这三个喂食器上。在无诱饵测试中，给定一天里有两个喂食器的位置进行了互换。松雀在觅食时似乎主要利用大规模的空间或远距离线索以及局部颜色线索。
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