great white heron hunting for fish on pond

aigrette alba albus american animal ardea beak behavior big bill bird birding birds casmerodius ciconiiformes clear common ecology egret egretta environment feed feeding fish fisheating forage fowl great guide heron hunting ichthyophagous lanka large leggy longnecked longshanks making ornithology pecker pike piscivore piscivorous pond spear sri throwing tours watching water white wintering