This was the first time I’ve seen up close the nest of the Tent Caterpillar. They’re regarded as pests but I’m sure are a valuable food source for birds who need protein for their young. The nest was very strong and I had to admire the sheen of the fine fibers used to spin this home. There are only eggs inside currently but Even those may be tasty to birds or bigger insects. The nest was about 12” long.