This is based on opinion. Please don't list it on a work's trope example list.
Nightmare Fuel / Silverwing
Tons of horrible things happen to bats, from burning alive to being bombs to getting your wings pecked off (as a child— and still alive) to suicide. And the list goes on and on.
Not to mention the things that could have happened to Shade and Marina: Being left for an owl, being lost in the sea(Shade) and drowning(Marina),not to mention being struck by lightning and getting attacked by bigger bats that could tear out your heart in a second. Shade and Marina were also close to getting their wings pecked off.