David Woodfall / Salt marsh channel at high tide with Talacre lighthouse in the background. Gronant Local Reserve, Denbighshire, Wales, UK, July 2018.

Guy Edwardes / Sand dunes on volcanic black sand beach, Vestrahorn, Hofn, Iceland, September 2018.

Mike Read / Sand dunes and slacks covered in Marram grass (Ammophila arenaria), Braunton Burrows Nature Reserve, North Devon, England, UK, October.

Mike Read / Sand dunes and slacks covered in Marram grass (Ammophila arenaria), Braunton Burrows Nature Reserve, North Devon, England, UK, October.

Mike Read / Sand dunes and slacks covered in Marram grass (Ammophila arenaria), Braunton Burrows Nature Reserve, North Devon, England, UK, October.

Edwin Giesbers / Bird ringer Henk-Jan Koning taking Tawny owl (Strix aluco) chick out of nest before ringing. Part of 60 year long-term study led by his father Fred to monitor raptor nests in a 3,400 hectare area of c...

Edwin Giesbers / Father and son, Fred and Henk-Jan Koning blocking hole of Tawny owl (Strix aluco) nest box before ringing and weighing birds. Part of 60 year long-term study to monitor raptor nests in a 3,400 hectare...

Edwin Giesbers / Tawny owl (Strix aluco), young chick in hand during nest box check. Part of 60 year long-term study by Fred and Henk-Jan Koning to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near A...

Edwin Giesbers / GoPro camera on pole used to check Northern goshawk (Accipiter gentilis) bird's nest in tree. Part of 60 year long-term to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amste...

Edwin Giesbers / Bird ringer and researcher Henk-Jan Koning climbing tree to investigate nest in cavity. Part of 60 year long-term study run by Fred Koning to monitor raptor nests in a 3,400 hectare area of coastal du...

Edwin Giesbers / Henk-Jan Koning climbing ladder to ring birds in nest hole while his dad Fred Koning blocks the hole with a jumper to stop the birds escaping. Part of 60 year long-term study to monitor raptor nests i...

Edwin Giesbers / Tawny owls (Stix aluco) two held during bird ringing session. Part of a 60 year long-term study to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amsterdam, The Netherlands. Febru...

Edwin Giesbers / Tawny owl (Stix aluco) held during bird ringing session. Part of a 60 year long-term study to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amsterdam, The Netherlands. February 2...

Edwin Giesbers / Bird ringer Fred Koning holding Tawny owl (Strix aluco) during ringing session. Part of 60 year long-term study to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amsterdam, The Ne...

Edwin Giesbers / Tawny owl (Stix aluco) lying on ground, bird ringer fitting ring. Part of a 60 year long-term study led by Fred Koning to monitor raptor nests in a 3,400 hectare area of coastal dunes. Near Amsterdam,...

Edwin Giesbers / Father and son, Fred and Henk-Jan Koning measuring Tawny owl (Stix aluco) wing during ringing session. Part of a 60 year long-term study to monitor raptor nests in a 3,400 hectare area of coastal dune...

Edwin Giesbers / Bird ringer Henk-Jan Koning extracting Tawny owl (Stix aluco) from nest in tree cavity before ringing it. Part of a 60 year long-term study led by Fred Koning to monitor raptor nests in a 3,400 hectar...

Edwin Giesbers / Researchers examining Raptor pellets to identify eaten prey. Part of a 60 year long-term study led by Fred Koning to monitor raptors and their nests in a 3,400 hectare area of coastal dunes. Near Amst...

Edwin Giesbers / Raptor pellet in hand, researcher dissecting pellet to discover prey eaten by bird. Part of a 60 year long-term study led by Fred Koning to monitor raptors and their nests in a 3,400 hectare area of c...

Edwin Giesbers / Bird ringer and researcher Fred Koning measuring and ringing four Tawny owl (Strix aluco) chicks. Part of a 60 year long-term study to monitor raptors and their nests in a 3,400 hectare area of coasta...

Edwin Giesbers / Tawny owl (Stix aluco), three chicks in tree stump during ringing session in woodland. Part of a 60 year long-term study led by Fred Koning to monitor raptors and their nests in a 3,400 hectare area o...

Edwin Giesbers / Tawny owl (Stix aluco) lying on ground whilst bird ring is fitted by bird ringer. Part of a 60 year long-term study led by Fred Koning to monitor raptor nests in a 3,400 hectare area of coastal dunes....