Star Born by Andre Norton

Raf, squatting on a small, padded platform raised some six inches from the floor, tried to study the inhabitants of the room without staring offensively. At the first glance, in spite of their strange clothing and their odd habit of painting their faces with weird designs, the city people might have been of his own species. Until one saw their too slender hands with the three equal-length fingers and thumb, or caught a glimpse, under the elaborate head coverings, of the stiff, spiky substance which served them for hair.

At least they did not appear to be antagonistic. When they had reached the roof top where the Terrans had landed their flitter, they had come with empty hands, making gestures of good will and welcome. And they had had no difficulty in persuading at least three of the exploring party to accompany them to their own quarters, though Raf had been separated from the flyer only by the direct order of Captain Hobart, an order he still resented and wanted to disobey.