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. 2010 Oct 7;5(10):e13218. doi: 10.1371/journal.pone.0013218

Table 1. Play behavioural patterns observed in adult sifaka over 481 play sessions recorded.

PLAY ITEMS DESCRIPTION
ACROBATIC PLAY (acp) One (solitary play) or more individuals (social play) climb, jump and dangle from supports of the environment (i.e. branches)
GRAB GENTLE (grg) An individual gently massages the playmate
PLAY BITE (pbit) An individual bites a part of the playmate's body
JUMP ON ANOTHER (pja) An individual jumps with its four limbs on a playmate
PLAY PULL (ppl) An individual grasps another playmate
PLAY PUSH (pps) An individual pushes another playmate with its hands or feet
PLAY SLAP (psl) An individual slaps any part of the fellow's body
PLAY BITE GENITALS (pbitg) An individual gently bites the playmate's genitals
PLAY RETRIEVE (pre) An individual holds the playmate in order to prevent him from leaving the play session
ROUGH AND TUMBLE (rt) Vigorous wrestling, involving patterns such as rolling, pulling, pushing, slapping, and falling on the playmate.
GENTLE WRESTLING (gw) Limbs entwined while sitting or laying individuals roll together placing their open mouths on each other.