They do remind me of cats in a way -- they're so agile among the rocks and tree limbs -- and they can sit perfectly still and silent for hours at a time. They don't speak often, but when they do -- except in the presence of danger -- they bring their faces very close together and murmur, accompanying this musical speech with astonishing expressions and gestures that incorporate the whole body. It's rather arousing to watch two of them doing this, and the others, if there are more than just the two present, seem as rapt by this performance as I am. It may last only a few moments, or go on for what seems like an hour or more, but it always seems to break off abruptly, when one of them simply turns and moves away.
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