The ingestive behaviorof beef heifers when submitted to different energy supplementation levels wasevaluated. Heifers grazing Italian ryegrass (Lolium multiflorum Lam.)and black oat (Avena strigosa Schreb) pasture, were supplemented withwheat bran, supplied daily at 2 p.m. at levels of 0; 0.5; 1.0; 1.5% of liveweight. The activities of grazing, rumination, idle and trough permanence, wererecorded by visual observation, at a ten minute intervals, in four periods of24 hours. For each supplementation level were allocated six animals of geneticgroups Charolais, 3/4Charolais/Nellore and 5/8Nellore/Charolais, with eightmonths of age and 158 kg of initial weight. Supplemented animals reduced grazingtime, compared with no supplemented animals, without changing estimated pastureconsumption. Animals supplemented at 1.5% of live weight, spent longer timeat trough and showed a higher visiting frequency. The supplementation levelsdid not interfere in rumination and idle times.
