Environmental parameters influence many aspects of an organism's life. However, animals that spend large portions of their lives underground remain understudied. We still don't know much about what the Amazon's iconic tarantulas get up to in the wild when no one is watching. I will monitor one of the largest tarantulas on the planet, the steely blue birdeater (Pamphobeteus antinous), and look at how temperature, humidity, and air pressure affect their movement.