Kingdom of the Spiders

Kingdom of the Spiders is a 1977 horror sciencefiction film directed by John Bud Cardos and produced by Igo Kantor, Jeffrey M. Sneller and James Bond Johnson. The screenplay is credited to Richard Robinson and Alan Caillou, from an original story by Jeffrey M. Sneller and Stephen Lodge. The film was released by Dimension Pictures not to be confused with the distributor Dimension Films. It stars William Shatner of Star Trek fame, Tiffany Bolling, Woody Strode, Lieux Dressler, and Altovise Davis.

Dr. Robert Rack Hansen Shatner, a veterinarian in rural Verde Valley, Arizona, receives an urgent call from a local farmer, Walter Colby Woody Strode. Colby is upset because his prize calf has become sick for no apparent reason, and the animal is brought in to Hansens laboratory. Hansen examines the calf, which dies shortly afterward. Hansen tells Colby he cannot explain what made the animal so ill so quickly, but takes samples of the calfs blood to a university lab in Flagstaff.A few days later, Diane Ashley Bolling, an arachnologist, arrives looking for Hansen. Ashley tells Hansen that the calf was killed by a massive dose of spider venom, which Hansen greets with skepticism and disbelief. Undaunted, Ashley tells him the problem is serious and that she wishes to examine the animals carcass and the area where it became sick. Hansen escorts Ashley to Colbys farm and moments after they arrive, Colbys wife, Birch Altovise Davis, discovers their dog is also mysteriously dead. Ashley performs a quick chemical test on the dogs carcass and concludes that like the calf, it died from a massive injection of spider venom. Hansen is incredulous, until Colby states that he recently found a massive spider hill on a back section of his farmland. He takes Hansen and Ashley to the hill, which is covered with tarantulas. Ashley theorizes that the tarantulas are converging together due to the heavy use of pesticides, which are eradicating their natural food supply. In order to survive, the spiders are joining forces to attack and eat larger animalsand humans. ........

Source: Wikipedia