The beast with two heads is meant to evoke Iago’s remark about the beast with two backs (Othello Act 1, Scene 1, ll. 126-127), for like the bard’s beast, this butterfly with two heads is a copulating pair.
The blending wings of Margined Whites really make them look like a single beast with a head at each end.
The odd thing is that they would fly around attached, and then stop to feed. Here, the male is sipping nectar.
The upper surfaces of wings became visible just before each flight to a new perch. Repeatedly, the couple chose to follow the old advertising slogan to fly united.
We have the first generation of Margined Whites flitting through Castlegar too. In flight they can be difficult to distinguish from other whites. It’s too easy for me to be distracted from chores when there are butterflies to watch and chase with a camera.