Studies have shown that even when a storm has covered their eggs in sand and swept away all landmarks, terns can still quickly find their unhatched offspring again.
曾有人做過燕鷗的研究發現，在大風暴吹襲過後，沙子掩埋了它們的蛋，地面上足供辨識的石頭、雜物也被取走，四周環境完全改觀，燕鷗爸、媽仍可很快地找到它們未出世的小寶寶。