Complete the Words

Most bats hunt at night, when their eyes are of limited use, so many species find food by listening instead. A bat (1)se___ out short, (2)hi__ (3)ca___ and (4)th__ (5)lis____ for the (6)ech___ that (7)bou___ (8)ba__ from (9)nea___ (10)obj____. By timing how long each echo takes to return, the bat can work out how far away an insect is and even which way it is flying. Using this skill, some bats catch hundreds of small insects in a single night, all in complete darkness.