A razorbill sits on a rock on the edge of a cliff looking out to sea in a seabird colony with turquoise water and flying seabirds in the background on Handa Island, Scotland

scotland handa island alca torda razorbill seabird flapping wings flying ocean watching nature biodiversity decline avian flu bird flu h5ni birds black and white sea marine aquatic maritime flap fly breast feather alert wildlife wild remote isolate inaccessible cliff sea cliff rocks guano environment ecology extinction biodiversity crisis climate change population ledge shelf niche plumage plume down peeking