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. 2001 Nov 1;56(2):113-120.
doi: 10.1016/s0376-6357(01)00191-7.

Aromatic plants in bird nests as a protection against blood-sucking flying insects?

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Aromatic plants in bird nests as a protection against blood-sucking flying insects?

Lucile Lafuma et al. Behav Processes. .

Abstract

The nest protection hypothesis suggests that some of the fresh plant material, brought by some bird species to their nests, contain secondary compounds that repel parasites or mask the chemical cues that parasites use to find the host. Corsican blue tits (Parus caeruleus) bring pieces of several species of aromatic plants to the nest at dusk, suggesting a protection against nocturnal agents such as blood-sucking flying insects. The potential repellent or masking effect of these aromatic plant species, alone or in mixture, was experimentally investigated in the mosquito Culex pipiens, using domestic chicks as bird hosts. Aromatic plants had a repellent effect against mosquitoes, although a masking effect could not be ruled out. The plant mixture was the most efficient, although some aromatic plants had a significant effect when used individually. These results are discussed in the context of the nest-protection hypothesis and of the impact of flying blood-sucking insects on bird behaviour and life history traits.

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