Keeping two groups of macropodid marsupials in adjacent enclosures at Warsaw ZOO created an opportunity to compare their behavior. Red kangaroo (Macropus rufus) and red-necked wallaby (Macropus rufogriseus) are two species common in zoological gardens which in the wild are crepuscular and nocturnal. The observations were carried out in November 2006 - July 2007 period. They lasted for 14 days and 100 hours. The nearly full spectrum of behavior was recorded and the differences between species in resting, elimina-tive, comfort, agonistic and reproductive behavior was ascertained. Red-necked wallaby kept at Warsaw ZOO turned out to be animal active in the daytime. It seemed that as a whole the red kangaroo was less active. In the reproductive behavior copulation and the birth were not recorded. On the basis of observations it was not possible to determine the type of social organization of kangaroo and wallaby (cohesion and subtle relations between individuals). It should be the subject of further investigations.