Hematological and biochemical reference intervals for populations of seabird species from an Archipelago in Rio de Janeiro, Brazil

For both brown boobies and magnificent frigatebirds, this study presented higher values in total thrombocytes and white blood cell counts, as well as uric acid and creatine kinase levels. These findings possibly reflect capture-related physiological responses from wild individuals. The reference intervals described here represent the first <i>in situ</i> values established for these two seabird species from the MoNa Cagarras in Brazil, providing essential baseline data for health and clinical evaluation, rehabilitation monitoring, and the conservation of tropical seabirds, while highlighting the importance of assessing the health of wild animals within their natural habitat.