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Afterwards, the female beetle covers her eggs with it as a defense against predators. Poisoning from cantharidin is a significant veterinary concern, especially in horses, but it can also be poisonous to humans if taken internally (where the source is usually experimental self-exposure).
Crushing the beetle also releases the cantharidin. [10] Cantharidin is a poisonous substance which can prove fatal if ingested. The lethal dose for humans when ingested is 10 mg, or 0.5 mg/kg of a human's body weight. The main concern revolves around when the beetle is ingested by livestock, in particular horses. [11]
Many other beetles, including ladybirds, blister beetles, and lycid beetles secrete distasteful or toxic substances to make them unpalatable or poisonous, and are often aposematic, where bright or contrasting coloration warn off predators; many beetles and other insects mimic these chemically protected species.
European rhinoceros beetle European rhinoceros beetle – three stages from larva to adult: larva (back), pupa (center), and imago (front). The Dynastinae are among the largest of beetles, reaching more than 15 centimetres (6 inches) in length, but are completely harmless to humans because they cannot bite or sting.
Luprops tristis, the Mupli beetle, is a plant detritus eating darkling beetle found in parts of India. The adult beetle is black and around 8 millimetres (0.31 in) long. While they are usually harmless to humans, when squeezed or picked up, they produce a defensive phenolic secretion that causes skin bur
Three different genera of rove beetles, all members of the same subtribe Paederina, can cause paederus dermatitis: Paederus, Paederidus, and Megalopaederus. [14] This irritant is called pederin and is highly toxic, more potent than cobra venom. [15] In different parts of the world, different species of rove beetle cause Paederus dermatitis:
To humans, getting "bombed" by a bombardier beetle is a decidedly unpleasant experience. [ citation needed ] This ability has evolved independently twice, as it seems, in the flanged bombardier beetles (Paussinae), which are among the most ancient ground beetles, and in the typical bombardier beetles ( Brachininae ), which are part of a more ...
Scarabiasis, or "beetle-disease", is a condition where beetles temporarily infest the digestive tract of other animals. It can also affect humans, and despite being a rare phenomenon, [1] it is the second most important insectal disease in humans after myiasis, which is caused by the larva of flies. The term is commonly used as a synonym of ...