Artist Dennis Hlynsky isolates the flight paths of birds. via This is Colossal:

Hlynsky first started filming birds in 2005 using a small Flip video recorder, but now uses a Lumix GH2 to record gigabytes of bird footage from locations around Rhode Island. He then edits select clips with After Effects and other tools to create brief visual trails that illustrate the path of each moving bird. Non-moving objects like trees and telephone poles remain stationary, and with the added ambient noise of where he was filming, an amazing balance between abstraction and reality emerges. The birds you see aren’t digitally animated or layered in any way, but are shown just as they’ve flown, creating a sort of temporary time-lapse.

You can view more of Hlynsky’s videos on his Vimeo page.