I discovered several bird nests suspended from tree branches along the edge of a lake in my hometown. Pendant nests are commonly constructed by birds who specialize in weaving pliable natural materials together to create a place to lay eggs and rear their young. A well built nest keeps the eggs warm and dry while they are incubating, and protects young birds from severe weather and predators.
The unusual thing about these pendant nests is that they are built almost entirely from fishing line. Resourceful birds collect fishing line which they find and use it as their primary building material. These photos were taken in the middle of winter, so any natural materials which were incorporated into the nests could have decomposed, but from what is left, we can see that fishing line was a major component in the structures.
At this point, I do not know what type of bird has built these nests, but I will definitely keep an eye on the area once Spring comes along, and I should be able to discover the identity of this avian recycler.