Golden conures or ararajubas (Guaruba guarouba) are endangered parrots endemic to the Brazilian Amazon forest. Body mass, blood cell counts, and total plasma protein were determined for 70 clinically healthy golden conures captive at zoologic parks and private breeder facilities in Brazil. Hematologic results (mean ± SD) were: Erythrocytes 3.6 ± 0.5 × 10⁶ cells/mm³, hemoglobin 12.8 ± 1.4 g/dl, packed cell volume 46 ± 3.8%, mean corpuscular volume 132 ± 20 fl, mean corpuscular hemoglobin (MCH) 36 ± 5.7 pg, mean corpuscular hemoglobin concentration (MCHC) 28 ± 3.5%, thrombocytes 26.3 ± 9.3 × 10³ cells/mm³, leukocytes 11.9 ± 4.5 × 10³ cells/mm³, heterophils 6284 ± 2715 cells/mm³, lymphocytes 5473 ± 2408 cells/mm³, monocytes 113 ± 162 cells/mm³, eosinophils 10 ± 42 cells/mm³, basophils 27 ± 64 cells/mm³. Body mass was 254 ± 24.9 g and total plasma protein (TPP) was 3.54 ± 0.58 g/dl. No statistical differences were observed between genders within age groups. Differences between juveniles (J) and adults (A) were identified for TPP (J < A), MCH (J > A), and MCHC (J > A). These results provide reliable reference values for the clinical interpretation of hematologic results for the species. Hematology may be an important tool for population health investigations on free-ranging golden conure populations and will also be essential to survey the health of release candidates in future reintroduction programs.