A study of the haematological profile of two common resident heron species of Chilika wetland(Asia), namely black crowned night heron and grey heron was undertaken during their wintering period to record the baseline data on haematology of these two species in the region. Significant differences were noted in blood parameters like haemoglobin concentration, total WBC count, PCV, thrombocyte count and MCHC between the two heron groups. However, no significant variation was noticed in parameters like total RBC, MCV, MCH and differential leucocyte count. It was observed that the night heron showed higher values for most of the parameters in comparison to grey heron.

Keywords: Ardeidae; Haemogram; Leucogram; Wading Birds.