Species: Circus aeruginosus
Habitat: throughout Europe and western Asia, playing dress-up
Gliding over a bed of reeds in south-west France, a male western marsh harrier circles his nest. Scanning the surrounding area, he spots a second male on a nest just 400 metres away from his own.
Ordinarily this would be the start of a fight. Male marsh harriers are territorial, and don’t like another male to set up home within 700 metres of the nest. Yet the new neighbour merits nothing more than a long look.
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