I removed the vent cover and felt around inside the duct and pulled out handfuls of debris including lots of pet hair that had accumulated there.
Carpet beetles in kitchen cabinets.
Carpet beetles can also thrive on lint hair and debris accumulating under baseboards and inside floor vents and ducts.
They can also be brought in by way of cut plants and flowers.
On the floor of the kitchen close to where the beetles were found was a vent for the a c system.
Carpet beetles are grouped and named according to their feeding habits which are varied carpet beetles black carpet beetles furniture carpet beetles and common carpet beetles.
Warehouse and cabinet beetles are a nuisance to insect collectors around the world because they infest boxes of stored dried insects and reduce them to collections of dust and insect parts.
Adults are typically 1 8 to 3 16 inch long elongate oval in shape and brownish black with variable patterns of transverse bands of pale yellow to off white hairs on the back.
These nocturnal insects prefer to hide in places such as storage containers crevices of furniture and behind kitchen shelves.
In most cases pest management professionals refer to these beetles simply as trogoderma beetles or use the term warehouse or cabinet beetles.
Adult carpet beetles can live both indoors and out but females prefer to lay eggs where larval food sources are abundant.
Some live inside the nests of birds or other animals and can live in walls or chimneys.
The pests can also proliferate on bird nests animal carcasses and dead insects cluster flies lady beetles stink bugs wasps etc which tend to be associated with attics chimneys basements and light fixtures.