Nick Upton / Young European eel (Anguilla anguilla) elvers, or glass eels, caught during their annual migration up rivers from the Bristol channel, swimming in a large holding tank at UK Glass Eels, which supplies elvers for reintroduction projects across Europe, Gloucester, UK, March

Winfried Wisniewski / Whooper Swan (Cygnus cygnus) stretching at sunset, Japan

Mitsuhiko Imamori / Emerald Damselfly (Lestes sponsa) pair mating, Shiga, Japan

Mitsuhiko Imamori / Green Crab Spider (Oxytate striatipes) shadow from under side of leaf, Shiga, Japan

Shin Yoshino / Sun behind a dense cloud cover, Okayama, Japan