This is a slightly smaller bird than carbo, and in the nesting season the white plumes of the latter are replaced by tufts of black and white feathers from above each eye. On the coast they nest the same as carbo and in company with them on rocky islands. In the interior they place their nests on the ground or occasionally in low trees on islands in the lakes. They breed in large colonies, making the nests of sticks and weeds and lay three or four eggs like those of the common Cormorant but averaging shorter. Size 2.30 × 1.40. Data.--Stump Lake, North Dakota, May 31, 1897. Nest of dead weeds on an island. Six eggs. Collector, T. F. Eastgate. [Illustration 081: Chalky greenish or bluish white.] [Illustration: Cormorant. Double-crested Cormorant.] [Illustration: right hand margin.] Page 80 [Illustration 082: Walter Raine. NESTS OF DOUBLE-CRESTED CORMORANTS.] Page 81 120a. FLORIDA CORMORANT. _Phalacrocorax auritus floridanus._ This sub-species is a common breeding bird in the swamps and islands of the Gulf coast and north to South Carolina and southern Illinois. The nests are placed in the mangroves in some of the most impenetrable swamps and are composed of twigs and lined with leaves or moss. They lay three or four chalky bluish white eggs. Size 2.30 × 1.40. Data.--Bird Is., Lake Kissimee, Florida, April 5, 1898. Three eggs. Nest made of weeds and grass, in a willow bush. 120b. WHITE-CRESTED CORMORANT. _Phalacrocorax auritus cincinatus._ Range.--Northwestern coast of North America, breeding in Alaska, and south to the northern boundary of the United States, breeding both in the interior and on the coast, in the former case generally on the ground or in low trees on swampy islands and in the latter, on the rocky cliffs of the coasts and islands. The nests are built in the same fashion as the other Cormorants, and the three to five eggs are similar. Size 2.45 × 1.40. 120c. FARALLON CORMORANT. _Phalacrocorax auritus albociliatus._ Range.--This sub-species breeds on the coasts and islands of California and southward. In company with other species of Cormorants, these birds breed in large numbers on the Farallones, placing their nests well up on the higher ridges and rocks. They breed most abundantly during May. When nesting on the inland islands, they place their nests in low bushes. Their nests and eggs are similar to those of the other Cormorants. Size 2.40 × 1.50. Data.--Farallones, California. Nest of weeds and seaweed on the rocks. Collector, W. O. Emerson. 121. MEXICAN CORMORANT. _Phalacrocorax vigua mexicanus._