Abstract

Territorial male great tits ( Parus major L.) usually forage on the ground, sing from perches with a mean height of 9.3 m, and perform most other activities between 2 and 4 m. Analyses of their habitat's visual and acoustical stratification indicate that great tits sing from high perches to make themselves hard to locate visually rather than to make their songs carry farther. The birds' selection of inconspicuous singing spots is further substantiated by their striking preference for hawthorn trees, which have an extremely dense crown and produce leaves very early in the year.

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