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Vector-borne pathogens play an important role in the regulation of wild populations and are model systems for ecological and evolutionary studies. The evolution of these systems is the result of triangular affairs between the parasite, the vector (mosquito) and the vertebrate host. Vectors present important interspecific and interpopulation differences in their feeding behaviour and consequently, interact with their pathogens with different frequencies. As model systems, we will use two multi-host/multi-vector pathogens (Plasmodium and West Nile virus), both transmitted by mosquitoes, and Turdus merula and Passer domesticus like a host. In particular, we will analyse how different host individual characteristics may affect vector attraction and how the heterogeneity on host attractiveness may affect the transmission dynamics of pathogens. We will focus special attention of odorant bird, the feeding behaviour of mosquitoes (mammals vs birds) and the influence of the parasite in the vector and host behaviour. This information may increase our understanding on the dynamics of transmission of numerous vector borne diseases, including pathogens potentially dangerous for humans and wildlife.

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