A word to the wise. There is a painting shown at the end of the film and it does look cheesy now. But the concept it implies is what matters and that makes for one of the strangest and creepiest movie endings of all time.
This is from the one of the reviews for this movie.
What does he mean though by concept - that the town remained cocooned and nobody noticed or that the spiders would gradually take over the earth?
The implication is that since the characters in "peaceful" Verde Valley, through the use of insecticides, killed off the spider's natural food supply, the spiders, by default, decided that the humans should become the spider's source of food, and decided to put the humans into "storage", so to speak.
That's what I always got from the ending.
***and as always, that's just my opinion, others may vary***
There is one line of dialogue in the film concerning the cocoons that applies to this ending. We are told that they (the mutated spiders) put food in cocoons. Make of that what you will -- "peaceful" Verde Valley is now a cocoon.
But smcarter1966, I am not sure that it was the fault of Verde Valley that the spiders attacked this town. The scientist told us that "these spiders" were some "600 miles" from where they were supposed to be. I think someone ELSE's use of insecticides etc. killed off the spider's natural food supply and somehow they (inexplicibly) ended up in the grounds of Verde Valley.
What i liked about this movie compared to most is a layman-terms cause that is at least halfway believable. You got insecticide that is killing off the spider's main food supply so they graduate/adapt to livestock/pets and then when that is no longer available they go on up the ladder to humans. This movie kinda reminded me of another movie that came out at the same time called Damnation Alley with its sense of doom & gloom armaggeddon with the future of america at that time. In that movie it was about killer cochroaches attacking humans after nuclear war. I'd recommend that movie if you liked this one.