Alex Mustard / Two female Common seahorses (Hippocampus kuda) fighting over territory on the seabed. The brief fight was preceeded by a ritualised, synchronised parade. Bitung, North Sulawesi, Indonesia. Lembeh Stra...

Alex Mustard / Common seahorse (Hippocampus kuda) female wrapping her prehensile tail around piece of wood on the seabed. Bitung, North Sulawesi, Indonesia. Lembeh Strait, Molucca Sea.

Edwin Giesbers / Seven spot ladybird (Coccinella septempunctata) on Mayweed (Anthemis sp) flower. Cyprus. April.

Alex Hyde / Yellow-flecked glassfrogs (Sachatamia albomaculata) mating pair, Osa Peninsula, Costa Rica

Alex Hyde / Yellow-flecked glassfrogs (Sachatamia albomaculata) mating pair, Osa Peninsula, Costa Rica

Alex Hyde / Nine-spotted moth (Amata phegea) feeding from a Mountain arnica flower (Arnica montana) Triglav National Park, Julian Alps, Slovenia. July.

Georgette Douwma / Blue triggerfish (Pseudobalistes fuscus). Egypt, Red Sea. Indo-Pacific.

Alex Mustard / Harlequin sweetlips (Plectorhinchus chaetodonoides) cleaned by a pair of bluestreak cleaner wrasse (Labroides dimidiatus). South Atoll, Tubbataha Atolls, Tubbataha Reefs Natural Park, Palawan, Philipp...

Denis-Huot / Village weaver bird (Ploceus cucullatus) male building a nest after the rains, Masai-Mara Game Reserve, Kenya. February.

Piotr Naskrecki / Yellow-spotted Tree Frog (Leptopelis flavomaculatus), Gorongosa National Park, Mozambique

Paul Harcourt Davies,Paul Harcourt Davies / Elder flower orchid (Dactylorhiza sambucina) in its two colour forms, Campo Imperatore, Gran Sasso, Appennines, Abruzzo, Italy, May

Georgette Douwma / Guineafowl puffer fish (Arothron meleagris) also known as the Golden puffer or Spotted puffer because is has three colour phases which differ dramatically. Maldives, Indian Ocean