An online resource based on the award-winning nature guide

October

Ruffed Grouse Preening

ruffed grouse preening IMG_3515Birds have up to 25,000 feathers, and most birds preen, or clean, waterproof and align their feathers, several times a day. Ruffed grouse, as well as most other birds, possess an uropygial gland, or preen gland, on their rump. (Some types of birds, including owls, pigeons, parrots and hawks, lack an uropygial gland and instead have specialized feathers that disintegrate into powder down, which serves the same purpose as preen oil.) The preen gland produces a waxy substance that helps waterproof feathers and keeps them flexible.

Ruffed grouse reach back and rub their beaks on this gland, and then distribute the wax on their body and wing feathers by stroking them toward the tip. The grouse grasps a feather near the base and draws it through the partly close beak, nibbling as it goes. This distributes the wax and cleans parasites from the feathers. In order to preen its head, the grouse must rub it on other parts of its body. Preening is usually done in a fairly open setting but with a degree of overhead protection, so that the grouse can watch for terrestrial predators, while being protected from hawks and owls.

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Winged Female Woolly Aphids Leaving Sumac Leaf Galls

10-29-14 sumac leaf galls IMG_7549The sac-like galls found on Staghorn and Smooth Sumac are anywhere from marble- to ping pong ball-size, and usually become obvious in late summer when they often acquire a rosy pink blush. Inside the thin walls of these galls is one big hollow cavity, teeming with tiny orange woolly aphids (Melaphis rhois). In the spring, female aphids lay an egg on the underside of a sumac leaf, causing the plant to form an abnormal growth, or gall. A number of parthenogenic generations are produced inside the gall, and then in late summer or early fall, the winged females fly to patches of moss, where they establish asexually reproducing colonies. According to biologist D.N.Hebert, these colonies produce the males and sexual females responsible for recolonizing sumac each spring.

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Eastern Tamaracks Turning Yellow

TAMARACK 050Eastern Larch, Larix laricina, is also known as Tamarack, the Algonquian name for the species which means “wood used for snowshoes.” This tree strongly prefers moist to wet sites in acidic soils and is a common sight in northern New England bogs. Eastern Larch is the only species of conifer in New England that drops all of its leaves/needles every year. The needles are borne on short shoots in groups of 10–20 and prior to falling off, they turn a beautiful golden color.

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Common Loons Migrating

10-27-14 common loons migrating2  146Most of the eastern U.S. and Canada Common Loon population shifts from freshwater inland breeding locations to coastal marine wintering areas, although some remain at inland freshwater sites throughout winter. Research shows that the very large loons in Maine, New Brunswick, and eastern New Hampshire do not migrate far and primarily overwinter in the Gulf of Maine, while smaller loons from other New England and New York breeding populations migrate to Long Island Sound south to New Jersey.

Some Common Loons begin their diurnal migration to their wintering territory in late summer, but most loons leave their breeding territory in September (high latitudes) and October (low latitudes), and arrive at their destination by the end of November. Breeding pairs and their offspring do not migrate together. Parents generally migrate first, usually separately; young remain on their lakes after adults have departed, until near freeze-up, and often migrate in groups. Although they often migrate singly, common loons do form groups (in some places, hundreds or thousands of birds) on large bodies of water before and during migration. These are referred to as staging areas. When migrating over land, loons can reach an altitude of a mile and a half; over water they usually fly within 300 feet of the surface of the water.

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Porcupines Entering Winter Dens

porcupine IMG_2597During the summer, porcupines are almost always found out in the open. At the end of October/beginning of November porcupines den up for the winter in the Northeast, with up to a dozen porcupines sharing the same den. While some adult males will spend days at a time in a conifer, most porcupines seek out rocky crevices in which to spend the day, with a smaller number finding shelter in hollow trees. Porcupines are hardy creatures – while dens do protect porcupines from heat loss, they contain no insulation, the entrances are open and the porcupines don’t huddle together for warmth. In addition, porcupines emerge from their dens to feed at night, when outside temperatures are lowest. (And yes, that is porcupine scat that is stuck in/on the porcupine’s quills.)

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Black Vine Weevil Larvae Crawling Deep Underground

black vine weevil 150Black vine weevil larvae overwinter in the soil. In the spring, the flightless adults emerge and feed at night on the outer edges of leaves, causing the leaves to have a notched margin. They mate and lay as many as 500 eggs in the soil near the base of host plants. The larvae hatch in a week or two and feed on plant roots until cold temperatures drive them further underground. The larval stage is quite destructive, especially to landscape plants such as rhododendron and azalea. Female black vine weevils have the ability to reproduce parthenogenetically. Fertilization of eggs is required to produce males, but no males have been observed in North America. (photo: adult black vine weevil on Jack-in-the-Pulpit fruit)

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A Variety of Beaver Lodge Designs

10-20-14 beaver bank den 080Beavers are hard at work refurbishing their mud and stick lodges in preparation for the coming winter, when their movements will be restricted and they will spend both days and nights inside their lodge. When we think of a beaver lodge, we picture it in the middle of a beaver pond. This was not always the case, however, and still isn’t today. The earliest and most primitive beaver lodges consisted of a burrow in the side of a high bank with the entrance under water (see exposed bank lodge entrance in photo insert). The next advance was the addition of sticks and mud piled over the top of the bank as added protection from predators (see photo). Eventually beavers started building a complete lodge on top of the bank which had an underwater entrance. The most advanced design is the lodge we most commonly associate with beavers — one that is built up from the bottom of the pond and is completely surrounded by water. It requires the greatest amount of work but offers the greatest amount of protection to the beaver.

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