Dichotomous Key/Ursidae

1

 * Food
 * Exclusively herbivorous -
 * At least partly omnivorous

2

 * Masseteric fossa on the lower jaw divided by a bony septum into two fossae
 * Present -
 * Not present - Tremarctos ornatus

3

 * Diet
 * Exclusively bamboo - Ailuropoda melanoleuca
 * Varies - Ailurus fulgens

4: Ursus

 * Hump of muscle over shoulder
 * Present - Ursus arctos
 * Not present -

5

 * Fur color
 * White - Ursus maritimus
 * Other coloration -

6

 * Leg direction while walking
 * Turned inward - Helarctos malayanus
 * Forward -

7

 * Time of activity
 * Nocturnal - Melursus ursinus
 * Diurnal - Ursus americanus