Page:Bird Haunts and Nature Memories - Thomas Coward (Warne, 1922).pdf/125

Rh appreciate when we are unable to hear them. The greatest horseshoe locates its flying prey by hearing, and possibly the noctule does the same. When my bats were fully awake a loud noise, such as that caused by dropping a book, kicking the leg of the table, or shooting, caused them no annoyance; but the scratch of lighting a match, a sudden hiss, or similar low note always startled them. It was interesting to note what sounds caused their ears to twitch and made them raise their heads.