Peter Cairns / naturepl.com / Close up of leg rings on Eurasian Crane (Grus grus), Hornborga, Sweden, April
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Wild Wonders of Europe / Geslin / Peregrine falcon (Falco peregrinus) chicks, one being put back in nest after being ringed, Sagrada familia cathedral, Barcelona, Spain, April 2009
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Doug Gimesy / Researchers from Earthcare St Kilda preparing to microchip a moulting Little penguin (Eudyptula minor). Bill diameter will be measured to determine sex. St Kilda breakwater, Melbourne, Victoria, Austr...
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Doug Gimesy / Researchers from Earthcare St Kilda scanning a moulting Little penguin (Eudyptula minor) for microchip. St Kilda breakwater, Melbourne, Victoria, Australia. December 2016. Model released.
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Oscar Dewhurst / White-throated antbird (Gymnopithys salvini) held in hand for ringing by researcher at Los Amigos Biological Research Station, Madre de Dios, Peru. April. Cropped
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Oscar Dewhurst / A researcher removing a bird that has been caught in the net for ringing. Los Amigos Biological Research Station, Madre de Dios, Peru. April
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Francisco Marquez / Greater flamingo (Phoenicopterus ruber) juveniles and a few adults kept temporarily in an enclosure for ringing, Fuente de Piedra lagoon, Malaga, Spain. August.
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Francisco Marquez / Greater flamingo (Phoenicopterus ruber) juveniles and a few adults kept temporarily in an enclosure for ringing, Fuente de Piedra lagoon, Malaga, Spain. August.
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Francisco Marquez / Volunteers watching Greater flamingo (Phoenicopterus ruber) juveniles kept temporarily in an enclosure for ringing, Fuente de Piedra lagoon, Malaga, Spain. August.
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Francisco Marquez / Volunteers rounding up Greater flamingo (Phoenicopterus ruber) juveniles for ringing, Fuente de Piedra lagoon, Malaga, Spain. August.
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Francisco Marquez / Volunteers holding sticks, watching Greater flamingo (Phoenicopterus ruber) flock flying, Fuente de Piedra lagoon, Malaga, Spain. August.
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Francisco Marquez / Volunteers holding sticks silhouetted, involved with tagging Greater flamingo (Phoenicopterus ruber) juveniles, Fuente de Piedra lagoon, Malaga, Spain. August.
