Cats sometimes make excited chirping or chattering noises when observing or stalking prey. The chicks utter loud chattering or ticking noises. Various yelping, chattering or barking sounds are made in the vicinity of the nest. The name "Garrulus" is a Latin word meaning chattering, babbling or noisy. Douglas squirrels are active by day, throughout the year, often chattering noisily at intruders. It is said that the clacking of tiles during shuffling resembles the chattering of sparrows. The man then kept them there for two hours, chattering to them incessantly. The calls include a cat-like whine, and chattering noises. Symptoms included swooning, moaning, chattering of teeth, hyperpnea, and tetany. While moving abruptly, they pause momentarily for chattering or singing. This is often accompanied by teeth chattering, purring and scent marking. Teeth chattering, hisses and exhalations are also made as aggressive warnings. He threw a pine cone at a jovial squirrel, and he ran with chattering fear. The species "garrulus" is from Latin and means chattering or noisy. They have been described as making a rapid chattering noise.