Multicase

Episyrphus balteatus (-) Exploitation (-) Bombus terrestris

Episyrphus balteatus (-) Exploitation (-) Aphidius colemani

Aphidius colemani (-) Exploitation (-) Bombus terrestris

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Observation

Exploitative competition for floral resources reduces sugar intake but differently impacts the foraging behavior of two non-bee flower visitors. This study shows that even insects with tiny nectar requirements, such as parasitoids, can suffer from heavy exploitative competition

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