Fig. 9From: The emergence of ecotypes in a parasitoid wasp: a case of incipient sympatric speciation in Hymenoptera?Static 4-chamber olfactometer to test the reaction of female N. vitripennis to odours of bird nest and carrion. 1: glass plate; 2: walking arena; 3: test field; 4: control field; 5: transition zoneBack to article page