Birds have been discovered to enhance their nests with human-made materials, including plastic items, wires, and even anti-bird spikes, as a strategy to protect their eggs from predators like magpies and ravens.
Research indicates that many bird species deliberately include these artificial objects and feathers in their nests. While these items may seem to serve no purpose in terms of insulation or structural integrity, they appear to play a significant role in increasing nest visibility to potential threats.
