Colour-ringed Gyr Falcons
From the Magazine Fuglar, published by BirdLife Iceland, in courtesy of BirdLife Iceland and Ólafur Karl Nielsen The main prey of the Gyr Falcon (Falco rusticolus) in Iceland is the Rock Ptarmigan (Lagopus muta). The size of the Icelandic Rock Ptarmigan population is highly variable and changes follow a rather regular pattern. It rises and […]