Mathias Schaef/ BIA / Rook (Corvus frugilegus) group at nests, Rhineland-Palatinate, Germany

Rick Tomlinson / Guests on superyacht Adele enjoy the view from the crow's nest, which can be hoisted and lowered by a hydraulic captive winch. It reaches 40 metres above the waterline. ^^^ Adele is 180 foot Andre Ho...

Rick Tomlinson / Guests enjoy spectacular mountain views from the crow's nest of the Superyacht "Adele". The crow's nest can be hoisted and lowered by a hydraulic captive winch. It reaches 40 metres above the waterlin...

Rick Tomlinson / Guests on board superyacht "Adele" enjoy the view from the crow's nest, which can be hoisted and lowered by a hydraulic captive winch. It reaches 40 metres above the waterline. ^^^ Adele is 180 foot...

Rick Tomlinson / Passengers on board Superyacht "Adele" can enjoy the view from the crow's nest, which can be hoisted and lowered by a hydraulic captive winch. It reaches 40 metres above the waterline. ^^^ Adele is...

Rick Tomlinson / Crew member in the crow's nest on 180ft Superyacht "Adele", Norway. It can be hoisted and lowered by a hydraulic captive winch and reaches 40 metres above the waterline.^^^ Adele is 180 foot Andre Ho...

John Waters / Carrion Crow {Corvus carone} on Wood ant nest{Formica rufa} 'anting' - using the ants to help clean the plumage of parasites, Quantock Hills, Somerset, UK

Daniel Mideros / Drone tracking shot of Pied crow (Corvus albus) rookery. The birds return, at sunset, to their nests in Baobab (Adansonia sp.) trees, Madagascar. November.

Tim Laman / Curl crested Manucode (Manucodia comrii) at nest. This species is one of the most primitive birds of paradise, similar to a crow-like ancestral form. Males and females look alike. Papua New Guinea