indian pond heron or ardeola grayii portrait stalk on prey from perched at edge of blue water body at keoladeo national park or

animal ardeola background behavior bharatpur bird blue body brown close closeup colours concentration cryptic destination ecotourism eyes fauna feathers fishing focused forest grayii heritage heron india indian jungle keoladeo national olive paddybird park perched plumage pond portrait prey roost site stalk streaked themes tourism travel tropical water wetland wild wildlife wings winter world