The Canada geese on the marsh have been following the call of nature of late. Swimming in tandem with his main squeeze, Mr. Goose flaps his wings in wild anticipation, juts his head high in the air and then dips it abruptly while his friend paddles calmly along in seeming disinterest. A pair of strong binoculars aid in the pursuit of the madcap activities going on all across the marsh. A great blue heron swoops down to vacuum up frogs and other water borne critters in the pond, and several sandhill cranes threaten to wake the dead as their throaty trilling echoes across the lowland habitat.