https://www.sasquatchpestcontrol.com/pest-library/carpet-beetle/
Carpet Beetle (Anthrenus spp.) — Larvae, Not Adults
The beetles on your windowsill eat pollen and harm nothing. The bristly larvae elsewhere in the house do all the damage, and their cast skins are the evidence.
carpet beetleanthrenusspplarvaeadults
https://biodiversite.parc-naturel-normandie-maine.fr/espece/223326
Anthrenus pimpinellae | Biodiv' Normandie-Maine - Parc & Géoparc Normandie-Maine
anthrenus pimpinellaenormandiemaineparc