great crested grebe (podiceps cristatus) juvenile speeding along river

water bird reflection waterbird duck animal ducks wildlife waterfowl pond nature beak mallard river swan sea goose wing wetland lake greatcrestedgrebe podiceps cristatus grebe naturephotography wildlifephotography flying flight birds avians feathers wings britishwildlifephotography avian seabirds animals great crested speeding juvenile young green park london england september 2022