When he has minimized the distance between himself and a butterfly, Tsai then begins to imitate a chameleon's walk: his legs first step forward, and then his upper body follows. While moving, he must consider the angle of his shots and any obstacles that might present themselves.
等到人蝶雙方距離拉近時，他便模仿「變色龍」的行進步伐：腳步先跨前，上半身再跟上，作這些動作的同時，還必須將攝影角度和繞過障礙納入考量。