| avian conservation practices strengthen ecosystem services in california vineyards. | insectivorous western bluebirds (sialia mexicana) occupy vineyard nest boxes established by california winegrape growers who want to encourage avian conservation. experimentally, the provision of available nest sites serves as an alternative to exclosure methods for isolating the potential ecosystem services provided by foraging birds. we compared the abundance and species richness of avian foragers and removal rates of sentinel prey in treatments with songbird nest boxes and controls without ne ... | 2011 | 22096555 |