"Tsaagan" represents the only dromaeosaurid remains (other than isolated teeth) known from the Ukhaa Tolgod region, though another dromaeosaurid, "Velociraptor", is known from the same formation.Animals that may have shared the same habitat with "Tsaagan" include "Protoceratops", "Shuvuuia", the small mammal "Zalambdalestes", the multituberculate mammal "Kryptobaatar", as well as several lizards and two yet-undescribed species of troodontid and dromaeosaurid.