Multiple choice general knowledge Which living bird lays the world’s smallest egg? Humming Bird Sparrow Flemingo Kiwi Reveal answer Fill a bubble to check yourself A Correct answer Explanation The bee hummingbird lays the world's smallest egg, about the size of a coffee bean or pea. Sparrow eggs are larger, flamingos (misspelled as 'Flemingo') lay larger eggs, and kiwis lay disproportionately large eggs.