As you have learned in “Owl-ch!,” humans are endotherms who, like other mammals and birds, must maintain a constant internal temperature in changing air temperatures. In this FACTivity, you will observe and record the ways you maintain a safe internal temperature over a 24-hour period. The question you will answer in this FACTivity is: In what ways do humans maintain a safe and healthy internal temperature? Materials: Graphic organizer ( included ) A writing utensil Topics: Active Forest Management, Wildlife, Air Temperature, Endothermic, Internal Temperature, Seasons.