While we were having a break I spotted a Tiger Mimic-Queen (Lycorea halia atergatis) couple mating. Since I was standing on a slope and the butterfly couple was quite out of reach I used the zoom option of my Canon A640 to take the above photo.
Note the black U shape on the hindwing that's almost everywhere surrounded by orange and the white dots - similar to the Monarch - on the body of the butterfly which distinguish this species from the Tiger-striped Longwing it mimics.