'At last I beheld several animal in a field...' What kind of animals did gulliver behold? What was the difference between the males and the female ones?

Details directly from the text;

"At last I beheld several Animals in a Field, and one or two of the same kind sitting in Trees. Their Shape was very singular and deformed, which a little discomposed me, so that I lay down behind a Thicket to observe them better. Some of them coming forward near the Place where I lay, gave me an Opportunity of distinctly marking their Form. Their Heads and Breasts were covered with a thick Hair, some frizzled and others lank; they had Beards like Goats, and a long ridge of Hair down their Backs and the fore-parts of their Legs and Feet, but the rest of their Bodies were bare, so that I might see their Skins, which were of a brown buff Colour. They had no Tails, nor any Hair at all on their Buttocks, except about the Anus; which, I presume, Nature had placed there to defend them as they sate on the Ground; for this Posture they used, as well as lying down, and often stood on their hind Feet. They climbed high Trees, as nimbly as a Squirrel, for they had strong extended Claws before and behind, terminating in sharp points, and hooked. They would often spring, and bound, and leap with prodigious Agility. The Females were not so large as the Males, they had long lank Hair on their Heads, but none on their Faces, nor any thing more than a sort of Down on the rest of their Bodies, except about the Anus, and Pudenda. Their Dugs hung between their Fore-feet, and often reached almost to the Ground as they walked. The Hair of both Sexes was of several Colours, brown, red, black and yellow."