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Of the 400 or so species in North America, scientists believe only about a dozen migrate from the northern United States and southern Canada to the southern United States and Mexico. So far, their research has revealed that dragonfly migration seems to be remarkably similar to bird migration. A Moment of Science is a daily audio podcast, public radio program and video series providing the scientific story behind some of life's most perplexing mysteries. Indiana Public Media is the home of WFIU Public Radio & WTIU Public Television, including your favorite programming from NPR and PBS.
Dragonfly, or Darning Needle, the name for an order of large, beneficial insects that feed on harmful insects such as gnats and mosquitoes. A dragonfly is an insect belonging to the order Odonata, the suborder Epiprocta or, in the strict sense, the infraorder Anisoptera. Dragonflies are valuable predators that eat mosquitoes, and other small insects like flies, bees, ants, and very rarely butterflies.
Dragonflies generally are brightly colored with yellow, green, blue, or red spots or stripes that stand out against darker backgrounds. True dragonflies pursue insects through the air and use all six legs to seize the prey, which they then crush with their jaws.
Absolutely gorgeous macro photos of dragonfly by hypergurl on flickr- definitely check out the rest of her pix. Horticulture & Home Pest News is filled with articles on current horticulture, plant care, pest management, and common household pests written by Iowa State University Extension specialists in the Departments of Entomology, Horticulture and Plant Pathology.

Iowa Odonata Survey  (a volunteer group surveying dragonflies and damselflies in Iowa). In fact, even in species that have been shown to migrate, like the green darner, not all populations make the journey. Scientists have wondered why they migrate, how they know where to go, and where precisely they go when they fly south. Like birds, the southbound dragonflies seem to use the tailwinds generated by northerly cold fronts to aid in their southbound flights. RSS makes it possible to subscribe to a website's updates instead of visiting it by delivering new posts to your RSS reader automatically.
It is characterized by large multifaceted eyes, two pairs of strong transparent wings, and an elongated body. They are usually found around lakes, ponds, streams and wetlands because their larvae, known as "nymphs", are aquatic.
Damselflies hover over reeds and grasses bordering ponds, where they obtain food by seizing other insects. Absolutely gorgeous macro photos of dragonfly by hypergurl on flickr- definitely check out the rest of her pix.. Other similarities to birds were that they refrained from migrating on windy days, and they followed visual landmarks such as coastlines and lake shores.
Dragonflies are similar to damselflies, but the adults can be differentiated by the fact that the wings of most dragonflies are held away from, and perpendicular to, the body when at rest.

Three pairs of medium-sized legs are attached to a short thorax, behind which is a long, slender abdomen.
Both damselflies and true dragonflies pass through an immature aquatic stage that lasts several years. HD Wallpaper and background images in the Insectology club tagged: insects macro dragonfly hypergurl picture photo.
In the last year and a half, scientists have begun fitting dragonflies with tiny radio transmitters in order to track their migration. Still, there are plenty of unanswered questions, like why some species are on the move, while others stay put. They actually glue the transmitters, along with tiny batteries, onto the undersides of the dragonflies’ abdomens. Scientists can then track the insects by plane since it is almost impossible to follow them on the ground. Dragonflies can fly forwards, backwards, and sideways, because at any one time their wings can rotate, move up and down, or move forward and backward.

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