Blackflies are daytime active insects. They attack people, cattle, horses and pigs. They are a nuisance, and in addition to persistent interference, they leave wounds on the skin after bites. In the 1920s they caused the death of several thousand cattle in Romania. In humans, in very rare cases, the development of harara occurs, which threatens especially infants. This is a poisoning of the body, which is caused by the toxic saliva of insects. It is worth knowing that biting blackflies is the domain of females, and it is they who drink the blood needed for reproduction. Males are harmless and feed on the nectar of flowers and the juices of plants.
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