Magnus Lundgren / Juvenile Ocellaris / Common clownfish (Amphiprion ocellaris) looking out from its home in an anemone, Raja Ampat, West Papua, Indonesia, Pacific Ocean.

Tui De Roy / Darwin's small ground finch (Geospiza fuliginosa), inspecting Galapagos giant tortoise for ticks, Isabela Island, Galapagos, South America.

David Pattyn / Great crested grebe (Podiceps cristatus) parents busy feeding their young with fish, in this case a small Tench (Tinca tinca) Valkenhorst Nature Reserve, Valkenswaard, The Netherlands. June

David Pattyn / Great crested grebe (Podiceps cristatus) parents busy feeding their young with fish, in this case a small Tench (Tinca tinca) Valkenhorst Nature Reserve, Valkenswaard, The Netherlands. June

Jo-Anne McArthur / We Animals / One piglet from a large litter looks around her small crate as her mother lies immobile beside her. Sows are kept in gestation crates and then farrowing crates in industrial farms, which is the standa...

Ross Hoddinott / Small pearl-bordered fritillary butterfly (Boloria selene) roosting on Hard fern (Blechnum spicant) fiddlehead. Marsland Valley Wildlife Trusts Reserve, Cornwall, England, UK. June.

Alex Mustard / Puffins (Fratercula arctica) swimming underwater. Puffins spend most of their lives at sea and are excellent underwater swimmers, which is how they catch small fish, their main food. , Farne Islands,...

Ernie Janes / Small white butterfly (Pieris rapae) and Small tortoiseshell butterfly (Aglais urticae) in flight, Norfolk, England, UK, June.

Edwin Giesbers / Small pearl bordered fritillary butterfly (Boloria selene) resting on stem. The Netherlands. August.

Edwin Giesbers / Firefly (Lamprohiza splendidula) light trails in woodland at night, multiple exposure. The Netherlands. June.

Edwin Giesbers / Small pearl bordered fritillary butterfly (Boloria selene), two resting on Scabious. The Netherlands. July.

Alex Mustard / Saddleback anemonefish (Amphiprion polymnus) barks a warning as it guards a clutch of developing eggs (beneath it) laid on a small stone, below a fold in its home, a Haddon's sea anemone (Stichoda...

Brandon Cole / Silky shark (Carcharhinus falciformis), feeding on small fish, juvenile Bigeye jacks (Caranx sexfasciatus) in baitball. Baja, Mexico, Pacific Ocean.

Alex Hyde / Red velvet mite (Trombidium holosericeum) running across soil where it hunts smaller invertebrates. Peak District National Park, Derbyshire, UK. April.

Ernie Janes / Small Tortoiseshell Butterfly (Aglais urticae) feeding on scabious flowers in hay meadow, Wensum Valley, Norfolk, England, UK, July.

Franco Banfi / Octopus, (Octopus vulgaris), splashing a cloud of ink and swim away with Bearded fireworm, (Hermodice carunculata) who want to eat a small octopus, top of the wall of Bisevo, Vis Island, Croatia, Adri...

Tui De Roy / Strawberry land hermit crab (Coenobita perlatus). On white coral sand beach, Small unhinhabited coral islet in Raa Atoll lagoon, Maldives

Lorraine Bennery / Brygoo's chameleon, / Leaf chameleon (Brookesia brygooi) tiny endemic chameleon. Madagascar.

Konrad Wothe / Firefly (Lamprohiza splendidula) light trails of males in forest, Bavaria, Germany. July.

Erlend Haarberg / Fogbow over sea ice. Fogbows are similar to a rainbow, but produced by very small droplets in fog or cloud, which diffract light, instead of large raindrops which do not, Svalbard, Norway, July.

Georgette Douwma / Translucent coral goby (Bryaninops erythrops) in Seapen (Virgularia gustaviana). Komodo National Park, Indonesia. Indo-West Pacific.

Alex Mustard / RF - Portrait of Coral hermit crab (Paguritta harmsi) living in a hard coral colony. North Male Atoll, Maldives. Indian Ocean (This image may be licensed either as rights managed or royalty free.)

Alex Mustard / Three Pink anemonefish (Amphiprion perideraion) living in a purple skirted magnificent sea anemone (Heteractis magnifica) on a coral reef, below a small island. Misool, Raja Ampat, West Papua, Indones...

SCOTLAND: The Big Picture / Crested tit (Lophophanes cristatus) perched above pine forest with a series of small lochans in background, Cairngorms National Park, Scotland, UK, December 2014.

Nigel Cattlin / Gardeners delight, Cherry tomato seedling just germinated with cotyledons above the soil

Nigel Cattlin / Gardeners delight, Cherry tomato seedling just germinated with cotyledons above the soil

Nigel Cattlin / Gardeners delight, Cherry tomato seedling just germinated with cotyledons above the soil

David Woodfall / Dunlin (Calidris alpina) small wader with young in machair. North Uist, Scotland, UK, June.

Staffan Widstrand / RF - Pied kingfisher (Ceryle rudis) group of three perched on branch, squabbling, Zimanga Private Nature Reserve, KwaZulu Natal, South Africa

John Shaw / Large leaves on Pacific blackberry (Rubus ursinus) above bracken fern and horsetail, is a small wet area. Oregon, USA. June.

Yashpal Rathore / Small tree frog (Rhacophorus lateralis) at night under starry sky, Western Ghats. India. Endangered and endemic to Western Ghats.

Nick Hawkins / Chum salmon (Oncorhynchus keta) migrate up a small river near Bella Bella, British Columbia, Canada. September

SCOTLAND: The Big Picture / Small pool on bog moorland, Tulloch Moor, Cairngorms National Park, Scotland, UK, August.

SCOTLAND: The Big Picture / Kelp forest (Laminaria digitata) with small fish, Shetland, Scotland, UK, July.

Marie Read / Sandhill cranes (Grus canadensis) (Florida race), adult with two small chicks crossing highway, Kissimmee, Florida, USA, March.

Shane Gross / Larval Wonderpus octopus (Wunderpus photogenicus) drifting in the open ocean at night off Anilao, Philippines.

Shane Gross / Wonderpus octopus (Wunderpus photogenicus) in its juvenile or larval stage. At this stage it is transparent and drifts in the open ocean as plankton. Anilao, Philippines.