In fact , several anhinga fossils were initially believed to be cormorants or shags ( see below ) .
Cormorants and anhingas are extremely similar as regards their body and leg skeletons and may be sister taxa .
Several anhinga fossils were initially believed to be cormorants or shags ( see below ) .
Cormorants and anhingas are extremely similar as regards their body and leg skeletons and may be sister taxa .