More than 500,000 Brazilian free-tailed bats, emerging to forage at night, light up the pitch black darkness of New Mexico's Carlsbad Cavern in this thermal infrared video. Read the story in The Scientist here - http://www.the-scientist.com/2009/10/1/63/1/
Balincaguin comes from the Zambal phrase, "Bali lan caguing" meaning "house of bats." This was the former name of the Municipality of Mabini, Pangasinan, when it was part of the Province of Zambales (of Mt. Pinatubo Volcano fame).