There is no information about the effect of season on hematological parameters and thier correlation with thyroid activity. Twenty-five one humped adult camels were used in this study. All camels were in identical environmental and nutritional situations. Blood samples were collected from jugular vein in summer and winter. Hematological parameters were measured by routine laboratoary methods and the concentrations of T3 and T4 were estimated by RIA method. The results of this study revealed
that the number of RBCs, PVC, Hb concentration, MCHC, the number of WBCs, the percent and absolute number of neutrophils and monocytes and the concentrations of T3 and T4 were higher in summer as compared with winter (P
)