Multiple choice Pick the odd one out. Ants, lepers, beavers, rabbits and parrots Ants Lepers Beavers Rabbits Parrots Reveal answer Fill a bubble to check yourself E Correct answer Explanation Correct. The common factor is the collective noun – colony – used with four of the five given options viz. ants, lepers, beavers and rabbits. The odd one out is the word - parrots. The collective noun for parrots is – company or pandemonium.