From this report of the density of hibernating clusters, it would seem that "bat capes" would be a better description than "bat chains":

"Density of hibernating bats can range from 300 to 484 bats/square foot. Some caves support over 80,000 bats. Suitable hibernation sites in caves must be draft- free and have a constant winter temperature."

http://www.fs.fed.us/r9/wildlife/tes/indianabat.htm


BTW perhaps Homer was thinking of Baht chains which are actually chains.

"Thai Baht Chains: "Thai gold" is .965 fine, a little over 23K. The alloy makes the gold harder so that it stands up to wear much better than very soft 24K gold. Thai gold is sold by the "Baht weight", which is 15.2 grams. So a "two Baht" chain would weigh 30.4 grams, just a little under one troy ounce (31.1 grams). ... The labor charge on a heavy, plain chain will be cheaper per Baht weight in comparison to a very fancy, lightweight pair of earrings."

http://www.belleaircoins.com/coins&things/essays/highkaratgold.htm