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Goldfinch use silk (spider or worm) to help glue their nest together. Their nests are often built so tight and strong that they are water-tight.
Good thinking, AshleyT. :)
It wouldn't be making a nest this time of year, and considering the silk is attached on both ends to plants in the photo, I would assume the bird might have just eaten a spider or something that was in the silk. Nests are made in July and August, it is long past breeding season now.
So neat! Why is it making a nest this time if year?
Since this Goldfinch is collecting for a nest, please consider adding this spotting to the Animal Architecture mission at http://www.projectnoah.org/missions/8082...
Spotted on Nov 30, 2013 Submitted on Nov 30, 2013