The mallard is a widely distributed water bird found everywhere in parks and ponds. The male, the drake, is easy to recognise by its striking green head and white neckband. It also is the only duck species to have curled tail feathers. The female is more camouflaged, with brown-speckled plumage. Mallards pair off during the winter months, which can result in some tumultuous behaviour patterns; the birds will often try to drown rivals. Many ducks inhabiting parks are a mix of wild ducks and all manner of domesticated ducks.