carolina wrens and aluminum foil (!?!)
I just cleaned out an old wren's nest and came across something rather unusual. Under the initial, most recent nesting layer was an older layer of material, complete with two unhatched wren eggs and-the biggest surprise- a collection of small balled-up pieces of what appeared to be aluminum foil. Finding a nest with old eggs that had been intentionally built-over is nothing new, but this is is the first time I recall finding any aluminum! I didn't find any other plastic or similar trash, just the metal bits, and the eggs were carolina wren eggs.