There seems to be a direct connection with White Cyclosa and the ending of the 1982 animated film The Plague Dogs - as if Boards of Canada wrote the track as an alternative score for this segment of the film. This is most apparent as the helicopter in pursuit of the two dogs flies directly overhead (synchronising flawlessly with the helicopter sample in the tracks opening). The finding is illustrated below in a YouTube video uploaded by KensDreaming.
Samples / Lyrics
The sound of a large helicopter's blades whirring plays throughout most of the track.
Trivia
Cyclosa is a species of spider that spins its silk into life-size decoys of itself to aid in hunting prey.[1]