I watched four black-capped chickadees busily investigating this big clump of DSV (Dog-strangling vine) for at least 15 minutes. They were very actively checking out the pods, occasionally plucking something off, and when they had finished with this clump, they flew to another nearby and repeated their actions. The next day the same activity was continuing. It appeared that they must have found insect eggs or larvae, but probably eggs, and were feeding on them. Whatever they were, they were minute, far too small for me to see through binoculars. Searching the pods with a hand lens didn't produce any further enlightenment as to what they were finding!