Many teachers of biology don’t realize how much valuable biological material may be collected after dark. In fact, certain specimens, as grasshoppers, earthworms, and various species of amphibia, are most easily captured then.
©1929 by Iowa State Teachers College
Abbott, Roy L.
"Collecting Specimens at Night,"
Science Bulletin: Vol. 1:
7, Article 10.
Available at: https://scholarworks.uni.edu/science_bulletin/vol1/iss7/10