I first read this story more than fifteen years ago, but I'm sure the book is much older and I have had serious trouble tracking it down.
It was a story about lizard-like aliens that lived in a very dense forest/tropical world. It mentions their anatomy having long claws that they click when threatened, secondary eyelids, warming their skin in the sun and the females being much larger, aggressive and having larger crests than the males. It mentions hatchlings and in-fighting amongst territorial clan, having pets called Lashas and them sleeping in large water filled tanks.
The story is told from a young male alien who finds a crash landed ship that contains a human being in a spacesuit. I remember a scene in which the human starts crying and they are confused by them. They help the human out, but I cannot remember the ending.
Any help would be very much appreciated.