The use of landmarks by food -storing corvids

TL;DRAbstract

The idea that some animals use visual cues, or landmarks, to orient through space has been studied for almost 60 years. It is in recent years that this question has become more focused and has began to address how animals are able to use spatial information from landmarks. In the following chapters, research investigating how food-storing birds in the corvid family use certain properties of landmarks when searching for hidden food in the laboratory is presented. The importance of local versus global cues for Clark's nutcrackers was investigated in Chapter 2. Species differences in landmark-use among Clark's nutcrackers, pinyon jays, and scrub jays are examined in Chapter 3 using the same experimental design as in Chapter 2. Finally, the effect of the proximity of landmarks for Clark's nutcrackers is investigated in Chapter 4. Three major conclusions can be drawn from these studies. First, global cues are important sources of information for Clark's nutcrackers. The birds may be using t

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