Clothes moths -- endangered species?

I have written about the decline of insects from time to time -- towns were once full of flies, so much so that everyone had net curtains to help keep them out. Nowadays nearly every city is virtually a fly-free zone. Even Delhi and Madras when I visited recently were not the fly-infested places of yesteryear. To me this is very scary, and I am constantly on the look out for hard data on the quantitative decline of insects. There's a lot on the qualitative declines and extinctions, but very little on numbers. I have put down the disappearance of species such as Red-backed Shrike in England, to the decline in large insects. I have noted how the commons of London were once crawling with grasshoppers in summer, but now thanks to pesticides and rotary mowers, grasshoppers are a rarity. anti parasite insecticides have poisoned cow pats, and so the list goes on. The latest to join my list is the clothes moth. As a child growing up in the 1940s and 50s, I remember clothes moth being a real problem when our woolly jumpers were put away for the summer. But now no one seems to worry. Is this just because so much of our clothing is synthetic, or are there other causes at work? The natural habitat of clothes moths is in birds nests among other places, and there are still plenty of birds nesting in towns. So where have the clothes moths gone?