The main pest wasp species in the Greater Wellington Region are Common wasps, German Wasps and Paper wasps. Wasps compete with native birds and insects for nectar. Wasps also consume native insects and even attack bird chicks in their nests. Just like the introduced possums, wasps have no natural predators in New Zealand, and they have access to plenty of food. Wasps are unwelcome guests in houses and businesses. Some people react very badly to their sting and venom.