Tag Archives: nests

Flight

Today the osprey are gone from Chocowinity Bay, abruptly, as if compelled. Their nests are empty as are the branches of dead cypress trees standing like stones beside the water. There are no osprey circling overhead or flitting between the wetland foliage and no sound but the indignant crows. The osprey have left, the adults and the newly fledged, driven south for the winter by unrelenting instinct. I’ll miss them.

Osprey nest, Chocowinity Bay, NC.
Osprey nest, Chocowinity Bay, NC.

Chocowinity Bay is full of osprey nests, great piles of sticks and twigs, padded with Spanish moss, bark, and grass, layered with the detritus of successive generations. Fish offal mostly. Bones and scales. The young soon learn to stream their feces over the side of their nests like sailors pissing over the gunwale.

The osprey mate for life and return to the same nest, year after year. And year after year, the nest, usually high in the fork of a dead cypress tree, grows more massive. After years of patient building, the nests can be 10 to 13 feet deep and 3 to 6 feet in diameter. A man could sit comfortably in such a nest if he wasn’t too fastidious about the smell.

There are exceptions, nests built on navigational markers or pilings or the ruin of a cypress tree that looks like a shipwreck, shattered timbers encrusted with barnacles, raised only a few feet above high water. That nest is draped with Spanish moss. It’s on my route to the head of the bay. I gave it a wide berth while the parents were busy bringing fish to feed chicks insistently chirping but now the nest is empty, like the others.

Osprey nest in drowned tree stump, Chocowinity, NC.
Not all Osprey nests are inaccessibly high in trees. Chocowinity Bay, NC.

The birds aren’t territorial except for their nests and then there’s no telling what might set them off. Bald Eagles, certainly, but there’s nothing that likes an eagle. The crows relentlessly mob any eagle that strays into the wetlands. Sometimes osprey take offense at fishing birds like cormorants, and sometimes not, but they always defend their nest against another osprey that isn’t their mate. They’ve been seen locking talons with an interloper and falling from the air into the water.

Osprey evolved to prey upon fish. They eat almost nothing else. One of their three forward facing toes can turn backward, becoming opposable. Their nostrils close when diving. And they have sharp spicules on the underside of their feet to help grip slippery fish.

Osprey diving with talons extended.
Osprey diving with talons extended.

Once in contact, the spicules weld predator to prey. Even a healthy osprey can deadlift only a 1 or 2-pound fish. The fish instinctively dive for the safety of deeper water. There are stories of large fish dragging osprey to the bottom.

Osprey skim the surface and pluck unwary fish from shallow water or plunge after wary fish swimming in deeper water. On Chocowinity Bay I’ve seen them dive from a height of 50 feet, tucking their wings as they plummet, at the last moment extending their talons and striking the water with an explosion of spray. More often than not they’re unsuccessful but often enough to thrive.

Osprey following a plunging dive. Photo credit: Steve McClaren.
Osprey following a plunging dive. Photo credit: Steve McClaren.
Osprey rising from water with fish. Photo credit: Steve McClaren.
Osprey rising from water with fish. Photo credit: Steve McClaren.
Osprey gaining altitude with fish. Photo credit: Steve McClaren.