Ladybugs, often seen as symbols of good luck, are generally harmless insects. While native ladybugs rarely bite, the Asian lady beetle can bite humans. These “bites” are typically very minor. Understanding the differences between these beetles and what prompts their defensive actions can help clarify common concerns.
Understanding the Ladybug “Bite”
The sensation described as a “bite” from a ladybug or Asian lady beetle is more accurately a pinch or a nip. These insects use their mandibles, or jaw-like structures, for chewing on prey like aphids. While not strong enough to inflict significant harm, they can cause a momentary pricking sensation on human skin. This occurs when the beetle explores a surface, seeks moisture, or feels threatened. Ladybugs and Asian lady beetles do not transmit any diseases to humans.
True Ladybugs Versus Asian Lady Beetles
Distinguishing between native ladybugs and the invasive Asian lady beetle is important for understanding their behavior. Native ladybugs are typically rounder and bright red with black spots, while Asian lady beetles are often more oval-shaped and vary in color, including orange, yellow, or black, with or without spots. Many Asian lady beetles have a black “M” or “W” shaped marking behind their head. While native ladybugs rarely bite, Asian lady beetles are far more prone to doing so, especially when congregating indoors during cooler months. They were introduced to control agricultural pests but have become an invasive species.
What Happens When You’re Bitten
When a ladybug or Asian lady beetle bites, the initial sensation is often described as a slight pinch or pinprick. This may be followed by the development of a small, raised red bump at the site. The area might also become mildly irritated or itchy, similar to a mosquito bite. If a beetle feels threatened, it may release a yellowish, foul-smelling fluid called hemolymph, which can cause minor irritation or stain surfaces. It is always advisable to wash the affected area with mild soap and water after a bite to clean the skin.
Are Ladybug Bites Dangerous
Ladybug and Asian lady beetle bites are not considered dangerous to humans, as they do not transmit diseases or venom. While typically harmless, some individuals might experience a mild allergic reaction. Symptoms of a mild allergic reaction can include increased redness, swelling, or itching beyond the immediate bite area. In rare instances, more severe allergic reactions, such as difficulty breathing or significant swelling, could occur, warranting immediate medical attention. However, such severe reactions are uncommon.