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Abstract
Ydenberg, R. 2000. The behavioural ecology of provisioning in birds. Ostrich 71 (1): 361.
In this talk I outline the idea of provisioning, stressing the difference between feeding and delivery. Foraging studies have just begun to recognise this distinction, and to explore some of its implications for behaviour. I outline a basic model of provisioning, based on central place foraging, in which the forager must spend some extra time on each excursion to gather enough energy to cover the excursion's energetic costs. I describe studies of provisioning pertinent to this framework, and go on to consider risk-sensitive provisioning, the role of predation danger in provisioning, and the question of how hard provisioners should work.