Need some help

Terrible script wastes a great idea and interesting setting and turns the movie into a borefest. Direction is occasionally downright lethargic, so that doesn't help either. The bats are on screen for maybe 10 or 15 minutes and that part is okay. The effects were more or less fine for the era, but they are rather dated now. The only real reason to watch this is if you're a fan of David Warner. He's great in this (at least until the script decides to turn him into a buffoon near the end). Other reasons to watch this - you (really) love eco-horror or you (really) love movies about Native American culture. That's pretty much it.