The only expected cormorant species in this area is the Double-crested Cormorant. Several Double-crested Cormorants (DCCO) were present for direct side-by-side comparison both perched on land and swimming in the water. DCCO were eliminated by the dark, feathered lores of this bird, rather than bare orange skin; the relatively smaller, thinner bill of this bird; the much smaller size of this bird; and the longer tail of this bird, relative to its body size. I estimated in the field that this bird was about half the total mass of the DCCOs, although Sibley says their average mass is about 70% of the DCCO's. This bird also had a noticeably angular rear edge to the gular patch with a visible border of white feathering. The tail looks shorter than expected in some photos. Primarily, this is due to the angle of the photos: in life, the tail was obviously longer relative to the body than that of the DCCOs. In addition, one photo showed that the central tail feathers were shorter than the next-to-central retrices. I believe this is an indication that the tail feathers were still growing in from a molt, and that the tail was not as long as it will be when the molt is complete.