Since butterflies are often active in wet grassy areas on the banks of creeks, Tsai will often proceed on all fours to match the height of the butterflies, which may be at knee level.
又由於蝴蝶經常在濕潤的溪畔草埔活動，如果牠們活動的高度不及膝蓋，就要以雙臂為足，匍匐前進。