Although dragonflies are predators, they themselves must worry about predators, also. Birds, frogs, lizards, spiders and fish think dragonflies are pretty tasty. So the things you do to attract them must also protect them. 2. Blooming plants attract bees, butterflies, and other pollinators that dragonflies like to eat.
After puncturing the skin with their mouthparts and feeding on blood, mosquitoes leave hard, itchy bumps. In the blood-feeding process, mosquitoes inject saliva into their host which creates the reactions that cause bite symptoms. Most mosquito bites are harmless and the symptoms subside in a few days. Some discomforting symptoms include swelling of the bite site, soreness, and bleeding. While mosquitoes are an itchy, uncomfortable nuisance, the important problem arising from mosquito bites is transmission of viral or parasitic diseases.
Once you are bitten by a mosquito that is carrying dengue fever, the average time for symptoms to begin is four to seven days. 1  While the average incubation period is from of four to seven days, you may experience symptoms as early as three days, or as late as two weeks, after being bitten.ther common symptoms caused by the virus can create hemodynamic changes, or changes that alter the flow of blood in the body. 1  Examples of blood flow changes seen with dengue fever include nose bleeds, bleeding from the gums, and areas of bruising.