| Book Description | Space and food are often limiting resources for breeding birds (Dhondt, 2011) and in situations where food and nest sites are not in limited supply, then space will limit the populations of blue tits and their main competitors, great tits, because they are both territorial breeding species. Blue tits are smaller and therefore subordinate to the larger great tits and as their woodland habitats are heterogeneous, there is evidence that space limits them because whilst they occupied only those territories with lots of mature oak trees when the breeding density was low, they occupied territories containing fewer oak trees when breeding densities were high (Dhondt et al., 1982). When the density of blue tits was then experimentally increased, they occupied the entire study plot but |
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