In a study conducted in Idaho, Klebenow and Gray measured food items for juvenile greater sage-grouse for each age class, classes being defined by weeks since birth. In the first week, insects were very important – 52% of the total diet. Beetles, primarily family Scarabaeidae, were the main food item. Beetles were taken by all other age classes of chicks, but in smaller amounts. All ages fed upon ants, and while the volume was generally low, ants were found in most of the crops. After week 3, insect volume dropped and stayed at a lower level throughout all the age classes, fluctuating but always under 25%.