Fossils of very large dragonfly ancestors in the Protodonata are found from million years ago Mya in Upper Carboniferous rocks; these had wingspans up to about mm 30 in.
There are about 3, extant species. Hawk Moths, which have been clocked at a speed of Dragonflies can travel at body-lengths per second in forward flight, and three lengths per second backwards. Dragonflies are hunters and they prey on other flying insects. They use their speed and agility to help them catch their meal in midair. Dragonflies are powerful and agile fliers, capable of migrating across the sea, moving in any direction, and changing direction suddenly.
In flight, the adult dragonfly can propel itself in six directions: upward, downward, forward, backward, to left and to right. The wings are powered directly, unlike most families of insects, with the flight muscles attached to the wing bases.
Dragonflies are not usually harmful to humans. Their abilities to fly fast and to hover are crucial to their survival -- helping them catch prey and to dodge predators. Dragonflies can do something many insects and other flying creatures such as most birds cannot: They can fly forward, backward, straight up or in a zigzag pattern. They fly fastest when moving straight forward, but the unpredictable movements of going backward and zigzagging catch prey and predators off guard, even if the speed is slower.
Dragonflies also are able to hover, using their wing speed to hold them in place in the air. Dragonflies can dart forward in the blink of an eye. They move about body lengths per second, which is equivalent to about 30 to 35 mph. These large insects have four wings and wingspans up to 5 inches. After a catch, dragonflies flip their bodies upside down and usually consume the prey while still in flight.
Dragonflies are not harmful to humans. In fact, dragonflies are a great asset during the spring and summer months when mosquitoes are most active. A single dragonfly can consume hundreds of mosquitoes a day. These fast flying insects can make excellent guests at your next lakeside party or picnic.
Just sit back and enjoy its grace and speed. Bed bugs are travelers. Before moving into your mattress or settling down in your nightstand, they may have lived in a hotel, office, school or other place where people gather. Because bed bugs can attach themselves to clothes, furniture, luggage and even your pets, they can also hitch a ride in your car, rental vehicle, taxi or rideshare.
This gives them easy access to anything you transport with you and a free ride to everywhere you go, including your home. But there's a reason why this saying is so old and so well known: bed bugs have been around for a very long time. These pesky insects have recently seen a resurgence in population and now, it's more likely than ever that you or someone you know will eventually deal with some kind of bed bug infestation.
Suddenly, that phrase takes on a whole new significance! No one wants to share their bed with bugs, and this feeling especially applies to the aptly named bed bugs. Bed bugs are small, parasitic insects that feed on our blood while we sleep. If you've spotted large, black ants in or near your house along with small piles of what looks like sawdust, there's a chance you may have wood ants.
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