Changes

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==Timing of Activity==

==Timing of Activity==

Cats are now commonly described as '''crepuscular''' (active primarily during twilight - dawn and dusk), and this has been confirmed in radio-telemetry studies<ref>Konecny, M. J.  (1987) Home range and activity patterns of feral house cats in the Galapagos Islands. ''Oikos''. 50, 17-23.</ref>. This is also implied by the structure and function of the cats [[Eye - Anatomy & Physiology|eye]], which has a number of adaptations that improve its function in low light conditions. However, cats have also previously been described as nocturnal and diurnal, based on findings from different studies. Under laboratory conditions in isolation from human contact, cats showed random patterns of activity in continuous light, and free-running circadian rhythms in constant darkness<ref>Randall, W., Johnson, R.F., Randall, S., Cunningham, J.T. (1985) Circadian rhythms in food intake and activity in domestic cats. ''Behav Neurosci''. 99(6), 1162-1175.
 </ref>. Food intake was stimulated by simulated starlight and the presence of people. There was also a significant level of idiosyncratic variation in entrainment to different light-dark cycles, indicating that some individuals were more capable than others of adapting to different day length.

Cats are commonly described as '''crepuscular''' (active primarily during twilight - dawn and dusk), and this pattern of activity has been confirmed in radio-telemetry studies<ref>Konecny, M. J.  (1987) Home range and activity patterns of feral house cats in the Galapagos Islands. ''Oikos''. 50, 17-23.</ref>. The cat's crepuscular nature is also supported by the structure and function of the its [[Eye - Anatomy & Physiology|eye]], which has a number of adaptations that improve its function in low light conditions. However, cats have also previously been described as nocturnal and diurnal, based on findings from different studies. Under laboratory conditions in isolation from human contact, cats showed random patterns of activity in continuous light, and free-running circadian rhythms in constant darkness<ref>Randall, W., Johnson, R.F., Randall, S., Cunningham, J.T. (1985) Circadian rhythms in food intake and activity in domestic cats. ''Behav Neurosci''. 99(6), 1162-1175.
 </ref>. Food intake was stimulated by simulated starlight and the presence of people. There was also a significant level of idiosyncratic variation in entrainment to different light-dark cycles, indicating that some individuals were more capable than others of adapting to different day length.

==Relationship with Human Activity==

==Relationship with Human Activity==