Nick Upton / Close up of a male Yellow dung fly (Scathophaga stercoraria) climbing up to the top of some sheep dung, Wiltshire, England, UK, March. Slow motion clip.

Kim Taylor / Redpoll (Carduelis flammea) male landing on Alder (Alnus glutinosa) Surrey, England. February

Terry Whittaker / 2020VISION / Canada geese (Branta canadensis) grazing in snow, Reddish Vale, Manchester, England, UK, March. Did you know? Canada geese can fly up to 1500 miles in just 24 hours if the wind is favourable.

Stephen Dalton / Caddisfly (Trichoptera) larva with a carapace it has constructed from bits of vegetation. Sussex, UK, March.

David Maitland / Close-up view of the upward-looking giant dorsal compound eyes of the St Marks fly (Bibio marci) used to detect female flies flying above. Like many insects the eyes are "hairy". Feltwell, Norfolk, UK...

David Maitland / Close-up view of the upward-looking giant dorsal compound eyes of the St Marks fly (Bibio marci) used to detect female flies flying above. Like many insects the eyes are "hairy". Feltwell, Norfolk, UK...

David Maitland / Head of female St. Marks fly (Bibio marci) showing normal sized compound eyes. Feltwell, Norfolk, UK

David Maitland / Head of female St. Marks fly (Bibio marci) showing normal sized compound eyes. Feltwell, Norfolk, UK

Wild Wonders of Europe / Geslin / Yellow-legged moustached icon hoverfly (Syrphus ribesii) resting on leaf in the Vatican garden with St Peter's in the background, Rome, Italy, March 2010

Wild Wonders of Europe / Geslin / Yellow-legged moustached icon hoverfly (Syrphus ribesii) on leaf in garden of Vatican City, Rome, Italy, March 2010

Heather Angel / Common bee fly (Bombylius major) hovering whilst nectaring on Honesty (Lunaria annua), proboscis covered with pollen. Nature reserve, Surrey, England, UK. March.

Nick Upton / Face fly / Autumn house fly (Musca autumnalis) dusted with pollen feeding on a Forsythia flower, Wiltshire garden, UK, March.