He's nothing much but fur,
And two round eyes of blue,
He has a giant purr
And a midget mew.
He darts and pats the air,
He starts and cocks his ear,
When there is nothing there
For him to see and hear.
He runs around in rings,
But why we cannot tell;
With sideways leaps he springs
At things invisible-
Then half-way through a leap,
His startled eyeballs close,
And he drops off to sleep
With one paw on his nose.
Eleanor Farjeon
The real measure of a day's heat is the length of a sleeping cat.
- - - Charles J. Brady
Cats, by nature, are nocturnal. As kittens they are likely more active at night, keeping their owners awake. They eventually adapt to our schedule, albeit an unnatural one for them