From Nature World News:
"The latest finding adds to the list of organisms hunted down by the eight-legged creatures. According to researchers, spiders are known to catch fishes, frogs, lizards and even snakes and birds. But, spiders preying on vertebrate like bats were thought to be a rare event." http://www.natureworldnews.com/articles/866/20130318/bat-catching-spiders-present-everywhere-except-antarctica-study.htm
Fishes? Not fish?
Also, fish, frogs, lizards, snakes, and birds are all vertebrates, too....