Hematological responses to hemorrhage by phlebotomy with and without replacement of blood volume with saline were measured in juvenile and adult male Coturnix coturnix japonica. 2. Recovery of total peripheral erythrocyte numbers and total peripheral leukocyte numbers occurred within 72 hr postphlebotomy in both treatment groups. 3. Saline replacement of blood volume following hemorrhage increased the total numbers and differential percentages of circulating reticulocytes at 72 hr postphlebotomy above the reticulocyte values of phlebotomized quail receiving no saline in both adult and juvenile Japanese quail.