Here are OGN's favourite finalists in this year's competition (the 58th) staged by London's Natural History Museum. Winners will be announced on 11 October and an exhibition of the 100 award-winning shots will open at the Natural History Museum on 14 October
A rare breeding frenzy of frogs in Costa Rica | Brandon Guell/Wildlife photographer of the year
Fish floating amidst algae growth in Finland | Tiina Tormanen/Wildlife photographer of the year
Red deer stag standing majestically as the snow falls in Richmond Park, London | Joshua Cox/Wildlife photographer of the year
Coconut octopus peeking out of its clamshell in Indonesia | Samuel Sloss/Wildlife photographer of the year
Young southern right whale off New Zealand | Richard Robinson/Wildlife photographer of the year
White-throated dippers arguing over the best spot beside a river in Finland | Heikki Nikki/Wildlife photographer of the year