Ernie Janes / Footpath sign in Norfolk countryside with Blackthorn hedgerow (Prunus spinosa) in flower. Norfolk, England, UK. April.

Sue Daly / Sloes, blackthorn fruit, (Prunus spinosa), Sark, British Channel Islands, October.

Gary K. Smith / Blackthorn (Prunus spinosa) flowers.

Dave Bevan / Male Bullfinch (Pyrrhula pyrrhula) feeding on Blackthorn (Prunus spinosa) blossom, Glamorgan, Wales, UK. March.

Dave Bevan / Female Bullfinch (Pyrrhula pyrrhula) feeding on Blackthorn (Prunus spinosa) blossom, Glamorgan, Wales, UK. March.

Nick Upton / Blackthorn blossom (Prunus spinosa) wide angle pan, Wiltshire, England, UK, April.

Nick Upton / Blackthorn (Prunus spinosa) in blossom, Wiltshire, England, UK, April.

Gary K. Smith / Goldfinch (Carduelis carduelis) male perched on Blackthorn blossom, Norfolk, UK, April

Gary K. Smith / Goldfinch (Carduelis carduelis) female perched on Blackthorn blossom, Norfolk, UK, April

Gary K. Smith / Greenfinch (Carduelis chloris) male perched on Blackthorn blossom, Norfolk, UK, April

Gary K. Smith / Chaffinch (Fringilla coelebs) male perched on Blackthorn blossom, Norfolk, UK, April

Gary K. Smith / Goldfinch (Carduelis carduelis) male perched on Blackthorn blossom, Norfolk, UK, April