Big bird

I was watching a bird in the middle of my territory.
It was on the grass.

I was trying to work out if I could get it or if it was too big.

I couldn't tell if I could grab it with my paws.

I couldn't tell if I could get my mouth round it.

I couldn't tell if it would fly off before I got to it, or if it was too fat to move quickly.

I couldn't really be bothered to move.

I stared at it until it flew off.