Biology Photography Competitions

The Telegraph - weekly

http://www.telegraph.co.uk/travel/picturegalleries/10399635/The-Big-Picture-photography-competition-round-278.html

Society of Biology

https://www.societyofbiology.org/get-involved/awards-and-competitions/photography-competition

list of competitions

http://thephotocontestdirectory.com/

Sony

http://worldphoto.org/competitions/sony-world-photography-awards-2014-open-competition/

Royal Horticultural Society

http://www.rhs.org.uk/competitions/photo-competition

Microscopy Events

http://www.rms.org.uk/events/NonRMSEvents