Runner up, Ecology and Environmental Science category
Invincible ants by Thomas Endlein.
Pitcher plants are carnivorous, drawing nutrients from trapped and digested insects.
The species shown here (Nepenthes bicalcarata) secretes sweet nectar on the rim and fang-like structures, which are very slippery for most insects except for one specialised ant (Camponotus schmitzii).
The ants live in the curled hollow tendrils of the plant and manage to climb in and out of the pitcher without any difficulties to steal a bit of nectar, as shown here