Tonlé Sap
As the common name suggests the grey-headed fish eagle is a specialist piscivore, which preys upon live fish and scavenges dead fish and occasionally reptiles and terrestrial birds and small mammals. Tingay et al. found that the diet of the grey-headed fish eagle in the Prek Toal protected area of the Tonlé Sap contains the endangered Tonlé Sap water snake. Whether this is the primary prey item of their diet or a seasonal occurrence in this are remains unclear.