Pet cats may spend most of their days motionless, but a large citizen-science tracking project suggests many of them are far more mobile at night than their owners realize. The Cat Tracker project, launched at the University of North Carolina and later repeated in Australia, fitted cats with tracking devices and followed 925 pets across six countries. Its final results, published in 2020 in the journal Animal Conservation, found that the animals' home ranges were remarkably small on average — about 3.6 hectares, or 0.036 square kilometers — but that a handful of cats ranged much farther.
The findings surfaced in a broader discussion of feline activity after an earlier study fitted pet cats with accelerometers and found they spend the vast majority of their time resting. Between 20.1 and 41.4 percent of their time was spent sitting, and a further 34.8 to 52.9 percent lying down. That led to the suggestion that the cats were somewhat slothful, a characterization that drew pushback from readers who pointed to tracking data showing secret nighttime excursions.
One account described a heavier ginger tabby named Squid taking regular nighttime walks to a local high school and a nearby shopping center. Another cat, a black-and-white animal named Semi, ventured about three kilometers from home. The Cat Tracker results put such anecdotes in context: roughly 40 percent of cats whose owners believed they were indoors or close by at night actually ranged over a hectare or more, often engaging in long-distance neighborhood explorations their owners never witnessed.
The project relied on citizen scientists who helped track the cats, and its findings have since been extended through a follow-up effort known as Cat Tracker 2.0. The original sample spanned six countries, and only three cats in the entire group ranged over more than one square kilometer, underscoring that most pet cats stay close to home even when they wander.
The debate over feline idleness is not the only line of research linking cats to human life. A separate study published in PLoS One examined wealth, health, cats and the parasite Toxoplasma gondii across 93 countries and found that national happiness was positively associated with cat density — meaning population density. The correlation adds to a growing body of work on the relationship between pets and human well-being, though it does not establish cause and effect.
For cat owners, the tracking data offer a practical reminder that a cat resting indoors during the day may still cover considerable ground after dark. The average range of 3.6 hectares is small compared with many wild predators, but it is large enough that owners who assume their animals never leave the yard may be mistaken. The researchers behind Cat Tracker emphasized the value of citizen science in gathering data at a scale that would be difficult for a single laboratory to achieve.
The accelerometer findings and the tracking results together paint a more nuanced picture than either alone. Cats are undeniably sedentary for much of the day, but inactivity in daylight does not rule out nocturnal roaming. The disagreement over whether cats are lazy, in other words, may depend on when and how closely someone is watching.
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