Stag beetles battling for oak sap

Stag beetles battling for oak sap

Watch two stag beetles fight over sap.
Contunico © ZDF Studios GmbH, Mainz
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Transcript

An oak tree in northern Germany oozes sweet sap. It's attracted hungry visitors. The stag beetle faces daunting competition from the swarm of bees. But there is worse to come. A rival has appeared on the scene. The two males lock horns and now there can only be one winner.

Against the odds, the smaller male has successfully fought off the large challenger.