However, the upper foot bones (metapodials) of Equus lambei are slender compared to Przewalski's horse.

[2] The bones of E. lambei also closely resemble the proximal phalanges of E. caballus lenensis, an extinct subspecies from the late Pleistocene of Siberia.

Equus lambei is one of the better supported species due to being based on diagnostic type material.

[6][3] The carcass consisted of a large part of the hide, a few tailbones, one lower leg, and some intestine.

[2][4] Based on the fossil records discovered in the Yukon, Equus lambei is believed to have been a small, slender, caballoid horse (about 4 ft (1.2 m) tall), with a broad skull and a relatively long protocones.

Family herds included four to ten females with their young and an adult alpha stallion.

Overall, E. lambei is considered to have been resistant to varying climatic conditions, although most individuals of this species seemed to have died in the winter season.