Since January 2024, the tiger mosquito (Aedes albopictus) is permanently established in 78 departments in France.

It is also present in Reunion, Mayotte and the French departments of America (Guadeloupe, Martinique, Guyana). Mainly active between months of May and NovemberHowever, this highly invasive species can carry diseases such as dengue, chikungunya and Zika.

Originating in the rainforests of Southeast Asia, the tiger mosquito is largely urban and has adapted to this environment by taking advantage of the multitude of vessels in which it can lay its eggs. Because it is anthropophilic (it is a man-made place), it is virtually impossible to get rid of it once you settle in a commune or county.

See the map of the departments concerned.

The portal mosquito warning allows you to report its presence on the territory: you will need to bring a photo of a specimen allowing its identification and answer 3 questions about the characteristics of the mosquito reported.

Recognizing the tiger mosquito

The tiger mosquito differs from other mosquitoes:

• it is diurnal: it stings during the day (mainly in the evening and morning);
• it is silent;
• it is very small: less than 0.5 cm (smaller than a 1 euro cent coin);
• its hind legs are black and have five rings of white scales. The back of the chest is covered with black scales. In the middle is a conspicuous straight center line of white scales;
• he is exophilic, meaning he lives mostly outdoors, but he can still get into homes.

Practical tips to prevent its proliferation

The female mosquito lays eggs in artificial water tanks. Each laying may consist of several hundred eggs. It is therefore advisable to avoid leaving at the disposal of laying sites:

• regularly empty or remove cups under flower pots, vases, or fill them with sand to conserve moisture without stagnant water;
• Store your various gardening or play containers away from rain.
• Cover the water collection canisters with a net or cloth.
• scrubbing the gutters to facilitate the proper flow of water.

Protect yourself

When you are outside:

• wear long, loose-fitting and light-colored clothing;
• use skin repellents and mosquito nets.

How do I know if I've been bitten by a tiger mosquito?

The first characteristic of the bite of the tiger mosquito is an itchy feeling that arrives very quickly, and intensifies for several minutes after the bite. Then a blister-like, flat blister-like button, like a blister, appears 5 millimeters to 2 centimeters in diameter, slightly lighter than the color of the skin, with a red halo that may widen depending on personal reactions. The pimple is usually hard, warm, and painful.

The bite of the tiger mosquito thus almost instantly scratches and then the itching disappears. However, they may reappear for several days if the temperature changes (after a shower, for example).