WP44692 Parasitic wasp (Braconidae) with ovipositor extended approaching caterpillar of Lesser Willow Sawfly (Nematus pavidus). The braconids approach very stealthily in order to lay eggs on the caterpillars which thrash from side to side in an attempt to protect themselves. A wasp can spend as much as one hour trying to get into position to deposit a single egg.

WP44692 Parasitic wasp (Braconidae) with ovipositor extended approaching caterpillar of Lesser Willow Sawfly (Nematus pavidus). The braconids approach very stealthily in order to lay eggs on the caterpillars which thrash from side to side in an attempt to protect themselves. A wasp can spend as much as one hour trying to get into position to deposit a single egg.