A study was conducted in the county of M'Hamid located South of Ouarzazate at about 200 km during January, April, June and October of 1990. For each of the four sampling periods, observations during six consecutive days were made. Observations concerned temporal behaviour, diet botanical composition and diet digestion. Grazing time (GT) of the dromedary varied among the different periods of the year (P less than 0.05). The time allocated to grazing decreased 56, 53, 42 and 38 per cent for January, April, June and October, respectively. The proportion of the resting in the total time for all activities varied from 18 per cent in January to 34 per cent in October (P less than 0.05). Distance walked averaged 27, 28, 30 and 25 km per day for January, April, June and October, respectively. At the mid season, the dromedary switched to the lower vegetation layer. Chamaephytic and herbaceous species contributions averaged 70 per cent. Herbaceous species were an important component of the dromedary diet in April as result of the spring rain. Overall, the dromedary included fewer species in its diet. Crude protein content averaged 12.60, 13.59, 19.63 and 10.94 per cent in January, April, June and October, respectively. The NDF content of the simulated diet was the lowest early and late in the season, probably because of the selectivity of leaves and twigs in the higher layer of vegetation (trees). Ingestion of ADF was similar to NDF. The ADL content of the dromedary diet decreased with advance in season. In vitro dry matter digestibility declined in April and June. The dromedary intake, expressed as kg of dry matter per animal averaged 3.23, 3.07, 3.22 and 2.47 for January, April, June and October, respectively.