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Table 2.

Estimates of image angular velocity under different stimulus conditions

Experimental conditionTunnel width (cm)Pattern velocity (cm s-1)Mean flight speed (cm s-1)Estimated image angular velocity (deg. s-1)
Stationary patterns (data averaged over all spatial frequencies and contrasts except 0% contrast) 22 45.8 239 
Stationary patterns (random dots, data from the static region in Experiment 3) 22 54.5 284 
Stationary pattern (random dots, data from Experiment 1) 32 74.3 265 
Stationary pattern (random dots, data averaged from both conditions in Experiment 2) 32 60.1 215 
Stationary pattern (random dots, data averaged from both conditions in Experiment 3) 32 70.0 251 
Moving pattern (random dots, data from Experiment 1) 32 7 (against flight direction) 74.0 287 
Moving pattern (random dots, data from Experiment 1) 32 30 (against flight direction) 59.7 320 
Moving pattern (random dots, data from Experiment 1) 32 37 (in flight direction) 101.9 227 
Moving pattern (random dots, data from Experiment 1) 32 52 (in flight direction) 123.4 254 
Experimental conditionTunnel width (cm)Pattern velocity (cm s-1)Mean flight speed (cm s-1)Estimated image angular velocity (deg. s-1)
Stationary patterns (data averaged over all spatial frequencies and contrasts except 0% contrast) 22 45.8 239 
Stationary patterns (random dots, data from the static region in Experiment 3) 22 54.5 284 
Stationary pattern (random dots, data from Experiment 1) 32 74.3 265 
Stationary pattern (random dots, data averaged from both conditions in Experiment 2) 32 60.1 215 
Stationary pattern (random dots, data averaged from both conditions in Experiment 3) 32 70.0 251 
Moving pattern (random dots, data from Experiment 1) 32 7 (against flight direction) 74.0 287 
Moving pattern (random dots, data from Experiment 1) 32 30 (against flight direction) 59.7 320 
Moving pattern (random dots, data from Experiment 1) 32 37 (in flight direction) 101.9 227 
Moving pattern (random dots, data from Experiment 1) 32 52 (in flight direction) 123.4 254 
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