Sunday, May 25, 2008

Be On The Lookout For The Snake-Bird


Where the banks of our local ponds, streams and marshes are overgrown with rank vegetation and stately pines and cypress trees are draped with long strands of Spanish moss, look for these curious birds.

Birds are known locally in different parts of the country by names based on their characteristics. Picturesque names have been hung around the neck of this strange looking bird. Depending on what section of the country you are visiting, you might hear the anhinga called the American darter, black darter, snake-bird or water turkey . . . the nickname it is known by in our area.

If it's a warm, sunny early morning you'll likely find one sitting quietly on a branch or a post with wings fully opened, drying them, as it exposes its wet feathers pleasantly to the warmth of the sun. It sees you approach but seems slow to leave its perch. As you come closer, it will slide into the pond, submerge its body and swim away under water with only its snake-like head and neck showing above the rippling greenish-colored water.

Long-necked, long-tailed and short legged, the anhinga measures around three feet from bill to the end of its light-banded tail. Its yellowish webbed feet have toes and sharp nails to use to scramble about among shrubs and trees where a pair builds their loose and bulky nest, some five to fifteen feet above the water. The nest contains lots of dead leaves, mixed with sticks. Its lining is green willow leaves.

The male claims the nest and advertises for a mate by wing waving and bowing before one or more females. Then the female chooses a mate and his nest site from one of the exhibiting males. When both are accepted by one another, she builds the nest with twigs and other plant matter brought to her by the male.

Though it breeds somewhat sparingly in the Central Savannah River Area, it spends the winters to the south along the Carolina and Georgia coasts and in Florida. Seldom do we see one in this region during deep winter.

Though slim, trim and prim in appearance when perched on a high dead branch or post, the water turkey is somewhat awkward when perched in a tree among the branches. It is the epitome of gracefulness in the air. It rises from its perch, mounting high in the air and soaring in circles gradually upwards until almost out of sight. When in flight it holds its long neck, wings and tail in a cross shape. This is a good identification mark.

Water turkeys have no song but make shrill rattlings and clicking calls. The males are blackish with silvery patches on the front part of their wings, while the females and young are more brownish. The female is the same size as the male but can be distinguished from him by her conspicuous fawn colored neck and breast. Pink eyes surrounded by bare green skin put the finishing touches on a completely weird appearance.

In the water, the anhinga swims gracefully and swiftly on the surface or sneaks away with its body submerged and only its snake-like head and neck showing in sinuous curves.

In the deep solitude of swamps lives a bird that soars like a hawk, perches like a cormorant, and swims like a snake. When his body is underwater with only his small head and long slender, curved neck showing, he does indeed, look like a snake slicing through the water with head back, poised to strike!

Friday, May 23, 2008

Birds Loose Their Mates Also


Birds and people have similar problems such as losing their mates through death or desertion. When this occurs it places a demanding burden on the surviving mate, whether bird or human.

A fellow bluebird enthusiast, Ann Sawyer, called to report that she found the nestlings of one of her bluebird families dead in the box when she monitored it.

She has seen neither parent since finding the young dead. The nestlings were about a week old.

Her question.

What could have caused the death of the baby birds? It could be they were fed by the parents worms and insects that had eaten a diet of pesticide sprayed foliage. This might be confirmed if the parents return to the box after it is cleaned out and start another family.

If the parents have truly disappeared, most likely they were killed because bluebirds don't commonly desert their nestlings. If one is killed, or flies away from its responsibilities, the other takes over the job of rearing the young until they are able to care for themselves.

Generally, female bluebirds start another nest almost immediately after the young leave the nest. The male then takes charge of the fledglings, feeding them and guiding them in selecting their own food, protecting them until they fly well. The parent birds of the dead brood might have already moved away from the disaster and started a new nest.

It is well to remove the nest as soon as the young fledge. On our bluebird trail, we observed that if it was not removed, often the pair would build a nest on top of the old one bringing it almost to the level of the opening. We found starlings, house sparrows, 'possums, raccoons or other predators could reach their dirty paws or claws into the nest and pull out the eggs or young and destroy them. This happened several times on our trail.

There was a couple who discovered one of their bluebird boxes on the ground and all but one egg gone. The husband secured the box back to the pole. A new nest was built and five eggs laid. The culprit returned and stole the second clutch of eggs without damaging the nest. They decided they needed a metal-mounted box.

Erecting a new box about six feet from the old nest and pole, they removed the nest from that box and put it in the new one. The bluebirds sat on the wire overhead and watched and cheered and hurrahed.

Three days after changing boxes and putting the nest in the new box there were two eggs in the nest. In time, a clutch of five eggs was laid.

These experiences point out how little bluebirds are disturbed by human contact. On our trail, when we found the female on the nest we quickly closed the box. We didn't try to count the eggs. We observed that if the hatching date was near, the mother would not leave but would sit tightly on the eggs. If incubation had just begun, she flew away as we touched the box.

The late T. E. Musselman pointed out that during 40 years of working with thousands of bluebird broods, he had never seen a bluebird desert a nest because of monitoring. Even some, he wrote, didn't leave the nest while he checked the eggs beneath her.

Wednesday, May 21, 2008