A male Montagu's harrier named Joey carryies a prey to his nest in Groningen, the Netherlands. Researchers name all harriers equipped with GPS-backpacks.
A resting pole placed next to an antenna (right) allows easy downloads of GPS data. Signals from birds as far as 3 kilometers away may be picked up. Groningen, the Netherlands.
Four Montagu's harrier chicks have grown too large to shelter from the rain under their mother. Flevoland, the Netherlands.
