Hematologic and plasma biochemistry parameters of the white stork (Ciconia ciconia) were studied. Blood samples were taken from a total of 80 adult white storks kept in captivity in Hungarian zoos and bird repatriation stations, between 2002 and 2006. Hematologic (packed cell volume, 46.3% ± 5.3%; hemoglobin concentration, 127.8 ± 20.4 g/L; red blood cell counts, 2.28 ± 0.35 10¹²/l/l; white blood cell counts, 21.6 ± 4.2 10⁹/l/l; heterophils, 61.0% ± 9.8% [13.1 ± 3.2 × 10⁹/L]; lymphocytes, 34.3% ± 9.1% [7.4 ± 2.5 × 10⁹/L]; monocytes, 3.44% ± 2.3% [0.78 ± 0.57 × 10⁹/L]; eosinophils 0.75% ± 0.91% [0.16 ± 0.21 × 10⁹/L]; basophils 0.38% ± 0.56% [0.04 ± 0.07 × 10⁹/L]) and plasma biochemistry values (aspartate aminotransferase, 267.5 ± 145.8 U/L; L-γ-glutamyltransferase, 47.6 ± 49.3 U/L; lipase, 70.3 ± 60.6 U/L; creatine kinase, 443.9 ± 182.2 U/L; lactate dehydrogenase, 880.4 ± 293.6 U/L; alkaline phosphatase, 177.5 ± 116.6 U/L; amylase, 917.6 ± 314.3 U/L; glutamate dehydrogenase, 7.3 ± 4.0 U/L; total protein, 45.2 ± 8.1 g/L; uric acid, 459.2 ± 254.3 µmol/L; and bile acids, 46.3 ± 20.5 µmol/L) were determined. The results obtained can be used as reference values, because there are no established values previously reported for adult white storks.