Bièvres: Act Before Mid-November Against Asian Hornet Nests

The Bièvres town hall emphasizes the importance of destroying nests before winter to prevent proliferation next spring.

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With the falling leaves, Asian hornet nests are becoming more visible. Bièvres town hall stresses the urgency of acting before mid-November to destroy these colonies and prevent spring proliferation.

The current season, from September to mid-November, is crucial in the fight against the Asian hornet. Colonies reach their maximum size and prepare to release hundreds of future queens (gynes) who will leave the nest before the first frosts to hibernate. The objective is to destroy these nests before the queens desert to bury themselves or shelter in isolated places, as colonies never reuse an old nest the following year.
It is strongly advised not to attempt intervention alone, as hornets can become particularly aggressive at this time to defend their colony. It is recommended to contact a professional pest controller who is a member of the Francilian Charter. A list of these professionals is available on the FREDON Île de France website.
For nests located on public property, the Bièvres town hall invites citizens to report their presence by contacting the town hall via email at contact@bievres.fr or by phone at 01 69 35 39 15. However, the town hall does not intervene on private property.
It is therefore essential to keep an eye on your gardens and green spaces to spot these nests and act quickly before winter arrives.
Based on information from the official source: Mairie de Bièvres (02/11/2026)