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1. 1. This study compares the hematology and blood chemistry of free-living and captive greater flamingos of different ages. 2. 2. Captive animals showed a greater number of white blood cells than free-living ones. Lymphocytes were the most abundant leukocytes, in both free-living and captive animals, although some decrease was detected with age. 3. 3. An increase in red blood cell number, hematocrit and blood hemoglobin content was detected in the first months of life. 4. 4. Plasma chemistry was notably changed with captivity; age-related changes were more scarce.

1. 1. We studied the hematology and blood chemistry of young Great Bustards (Otis tarda). 2. 2. Red cell numbers (2,460,000 cell/mm3), hemoglobin content (11.7g/100ml) and hematocrit (41%) are smaller than in previously studied captive adults, whereas leukocytes numbers (11,000 cell/mm3) are lower. 3. 3. Heterophils (38%) and lymphocytes (47%) are in similar proportions. Eosinophils are also abundant (14%), the other white cell types being more scarce (basophils 2%, monocytes 4%). 4. 4. Plasma uric acid level (22mg/100ml) is higher than urea level (17mg/100ml). Cholesterol and triglycerides plasma concentrations are 132 and 83mg/100ml, respectively. 5. 5. Plasma protein levels (3.6g/100ml) are similar to that previously found in adult captive animals.

1. 1. The hematology and blood chemistry of six captive White Pelicans ( Pelecamts onocrotalus ) was studied. 2. 2. The number of erythrocytes was 2,500,000/mm 3 , the hematocrit was 41.5% and the blood hemoglobin content was 13.9g/100 ml. 3. 3. Leukocyte number was 13,500/mm 3 , the differential counts being heterophils 59.5%, eosinophils 3.1%, basophils 1.0%, lymphocytes 35.3% and monocytes 1.1%. Thrombocyte number was 4500/mm 3 . 4. 4. Plasma composition was (mg/100 ml): glucose: 191; triglycerides: 61; cholesterol: 99; phospholipids: 166; urea: 7.8; uric acid: 5.5; creatine: 0.5 and bilirubin: 0.1. 5. 5. Total protein concentration was 3.4 g/100 ml. 6. 6. Enzymatic activities (U/1) were: GOT: 268; GPT: 26; LDH: 994; CK: 583; γ-GT: 0–19 and LAP: 57.

1. 1. The hematology and blood chemistry of 10 captive adult Ara rubrogenys is described. 2. 2. They showed 3,650,000 erythrocytes/mm3, a hematocrit of 49.9% and a blood hemoglobin content of 15.2g/100ml. 3. 3. Leukocyte number was 10,000 cells/mm3, the differential counts being 42.2% heterophils, 0.8% eosinophils, 2.4% basophils, 49.9% lymphocytes and 4.5% monocytes. 4. 4. The number of thrombocytes was 21,800 cells/mm3. 5. 5. Plasma composition was (mg/100ml): glucose 295; triglycerides 102; cholesterol 166; urea 5.8; uric acid 5; creatinine 0.3; bilirubin was not detected and total protein concentration was 3.2g/IOOml. Enzymatic activities were (units/1): GOT 188; GPT 10 and alkaline phosphatase 315.

1. The hematology and blood chemistry of 15-68-day-old chicks have been studied. 2. Red cell numbers (1,900,000/mm3), hemoglobin content (11.5 g/dl) and hematocrit (37.5) were similar in both species of storks. 3. Total numbers of leucocytes (63,000/mm3) were similar in both species, whilst differential leucocyte counts were not. 4. Higher levels of plasma protein, GOT and cholesterol in HDL were found in white storks when compared with black storks but not differences were detected in plasma levels of triglycerides, total cholesterol, urea, uric acid, GPT and alkaline phosphatase.

1. 1. The hematology and blood chemistry of 27 Chilean flamingos, Phoenicopterus ruber chilensis, has been studied. 2. 2. Females have higher erythrocyte number (3.2 × 106 cell/mm3) and hematocrit (46.6%) than males (2.7 × 106 cell/mm3 and 42.3%) whereas both sexes have the same hemoglobin content (13.1 g/100 ml) and thrombocyte number (83.9 cell/mm3). 3. 3. Both sexes have the same number of white blood cells (23.5 × 103 cell/mm3), heterophils and lymphocytes being the most abundant cellular type (49% and 44%, respectively). 4. 4. Plasma content in total proteins, uric acid, urea, triglicerides, cholesterol as well as plasma activity of alkaline phosphatase, glutamil-piruvate transaminase and creatinin kinase are similar in both sexes. Males have higher activity of glutamil-oxalacetic transaminase than females. 5. 5. Values of two young Chilean flamingos and two adult pink flamingos are also included.

1. 1. We studied the hematology and blood chemistry of free-living adult White Storks ( Ciconia ciconia ) and compared the values obtained with those previously found in chicks of the same species [Puerta M.L., Munoz-Pulido R., Huecas V. and Abelenda M. (1989) Comp. Biochem. Physiol . 94A , 201–204]. 2. 2. Red cell number (2,590,000 cell/mm 3 , hemoglobin content (13.9 g/100 ml), hematocrit (44.1%) were higher than in chicks. 3. 3. Thrombocyte number (12,000 cell/mm 3 ) and total leukocyte counts (23,800cell/mm 3 ) were much smaller than in chicks. Heterophils were the most abundant white blood cell (72%), lymphocytes being in the second place (20%), which differs from the differential count found in chicks. 4. 4. Plasma total proteins (4.3g/100 ml), urea (11.4mg/100 ml) and cholesterol (145mg/100 ml) were similar to those found in chicks. Plasma uric acid level (2.5 mg/100 ml) and triglycerides (415 mg/100 ml) were, respectively, smaller and higher than in chicks.