Lizards may be small, with only a single hearing bonelet compared to our three, and without earflaps, but their hearing is typically good. Most lizards can hear frequencies between 100 and 5,000 Hz (although they are most sensitive between 400 and 1,500 Hz), compared to between 20 and 20,000 Hz in humans. So how do lizards react to noise pollution?
Here, scientists studied the impact of noise from low-flying military aircraft on the behavior and well-being of an uncommon lizard, the Colorado checkered whiptail . This was done at the Fort Carson US military Installation near Colorado Springs, where Apache, Chinook, and Blackhawk helicopters regularly fly over, and occasionally transport aircraft and F-16 fighter jets fly over the whiptails' habitat..
Several A. neotesselatus populations exist on the 550 square km of land belonging to Fort Carson, including the 0.05 square km of 'Training Area 55' , the site of the present study. Aircraft regularly fly over TA55 at altitudes below 6km. Each morning and early afternoon, the researchers caught as many unmarked individuals as possible, after observing their behavior for three minutes. Every female was caught only once.
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