The owls with more parasites in their bloodstream took longer to hoot back — those with the most parasites taking more than twice as long as the parasite - free owls.
Burung hantu yang aliran darahnya mengandung lebih banyak parasit, membalas lebih lambat — burung yang berparasit terbanyak membalas dua kali lebih lambat daripada burung yang bebas parasit.