Mark Moffett / Phantasmal Poison Dart Frog (Epipedobates tricolor) near Cuenca, Ecuador this frog exudes epibatidine, a chemical with analgesic qualities two hundred times as powerful as morphine

Premaphotos / Common wolf spider (Pardosa pullata) juvenile in typical stance about to take flight, to 'balloon', as a strand of silk exudes from its rear end, UK

Konrad Wothe / Sheep Tick (Exudes ricinus) juvenile, Germany

Nick Upton / Common butterwort (Pinguicula vulgaris) leaf with a small fly trapped by the sticky droplets this carnivorous plant exudes from glandular hairs, Cwm Cadlan National Nature Reserve, Brecon Beacons, Wal...

Nick Upton / Common butterwort (Pinguicula vulgaris) leaf with a Red ant (Myrmica sp.) trapped by the sticky droplets this carnivorous plant exudes from glandular hairs, Cwm Cadlan National Nature Reserve, Brecon...

Emanuele Biggi / Asian weaver ants (Oecophylla smaragdina) protecting a parasitic butterfly pupa (probably Lycaenidae sp.) which exploit the ants for food and protection for its development. The ants do this because t...

Robert Thompson / Oak bracket fungus (Inonotus dryadeus) close up of liquid droplets that it exudes, Gosford Forest Park, County Armagh, Northern Ireland. August.

Robert Thompson / Oak bracket fungus (Inonotus dryadeus) close up of liquid droplets that it exudes, Gosford Forest Park, County Armagh, Northern Ireland. August.

Nigel Cattlin / Cytospora canker (Cytospora leucostoma) canker disease exudation from a peach tree trunk, USA, September