Clay Bolt / Composite image of Wallace's giant bee (Megachile pluto) with European honey bee (Apis melifera). This is the world's largest bee, which is approximately 4 times larger than a European honey bee. One...

Steve Downer / Yellow slug (Limax maximus) moving across bridge over road with traffic in the background. Birmingham, UK. June.

Simon Colmer / Green-veined White butterfly egg (Pieris napi) above, Orange-tip butterfly egg (Anthocharis cardamines) below, on Garlic mustard (Alliaria petiolata) Sussex, UK. June.

MYN / Gil Wizen / Comparison of larva and adult beetle (Epomis circumscriptus), Central Coastal Plain, Israel, April. Focus-stacked. meetyourneighbours.net project

MYN / Gil Wizen / Israeli sand cockroach (Heterogamodes hebraica) composite showing ventral and dorsal view of female, Central Coastal Plain, Israel, April. Focus-stacked. meetyourneighbours.net project

Theo Bosboom / Conifer trees in snowy landscape, near Baraque Michel, Belgian Ardennes, January 2010

Yashpal Rathore / African elephant (Loxodonta africana) and Warthog (Phacochoerus africanus) waiting near waterhole. Savuti, Chobe National Park, Botswana.

Ingo Arndt / Hummingbird (Trochilidae) egg and Ostrich (Struthio camelus) egg, a size comparison of eggs of world's smallest and largest extant birds. Senckenberg Museum, Frankfurt, Germany.

Nigel Cattlin / Comparison of untreated and herbicide treated Soybean (Glycine max) crop. Weeds have resulted in stunting of crop due to competion, Mississippi, USA.

Nick Hawkins / Comparison of the invasive European green crab (Carcinus maenas) on left to native Atlantic rock crab (Carcinus irroratus) on right. Kejimkujik Seaside National Park, Nova Scotia, Canada. July.

Nick Upton / Mallard drake (Anas platyrhynchos) dwarfs a drake Teal (Anas crecca) as it walks past it on a frozen lake, Gloucestershire, UK, February.

Nick Hawkins / Leaves and fruits of four different Mangrove (Rhizophoraceae) species. San Cristobal Island, Galapagos.