120. =Double-crested cormorant.= PHALACROCORAX DILOPHUS. Perhaps breeds in Colorado, as it breeds abundantly in Utah; all present records from eastern foothills.
125. =American white pelican.= PELECANUS ERYTHRORHYNCHOS. Once a common migrant; a few remained to breed; now rare; still noted on both sides of the range.
129. =American merganser.= MERGANSER AMERICANUS. Resident; common migrant and winter sojourner; a few breed in mountains and parks; generally distributed in North America.
130. =Red-breasted merganser.= MERGANSER SERRATOR. Rare winter sojourner; common migrant; breeds far north.
131. =Hooded merganser.= LOPHODYTES CUCULLATUS. Rare resident both summer and winter; breeds in eastern part and in the mountains; general range, North America.
132. =Mallard.= ANAS BOSCHAS. Very common in migration; common in winter; breeds below 9,000 feet, on plains as well as in mountains; general range, whole northern hemisphere.
134a. =Mottled duck.= ANAS FULVIGULA MACULOSA. Rare migrant; an eastern species, sometimes wandering west to plains.
135. =Gadwall.= CHAULELASMUS STREPERUS. Summer resident; common in migration; breeds on plains; also in sloughs and small lakes at an elevation of 11,000 feet in southern part of State; breeds abundantly at San Luis Lakes.
137. =Baldpate.= MARECA AMERICANA. Summer resident; breeds from plains to 8,000 feet.
139. =Green-winged teal.= NETTION CAROLINENSIS. Common summer resident; abundant in migration; a few breed on the plains; more in mountains and upper parks.
140. =Blue-winged teal.= QUERQUEDULA DISCORS. Same records as preceding.
141. =Cinnamon teal.= QUERQUEDULA CYANOPTERA. Common summer resident; breeds both east and west of the range; a western species; in winter south to Chili, Argentina, and Falkland Islands; sometimes strays east as far as Illinois and Louisiana.
142. =Shoveller.= SPATULA CLYPEATA. Summer resident; abundant in migration; breeds in suitable localities, but prefers mountain parks 8,000 feet in altitude; breeds throughout its range, which is the whole of North America.
143. =Pintail=. DAFILA ACUTA. Rare summer and winter resident; common migrant; mostly breeds in the North.
144. =Wood duck.= AIX SPONSA. Rare summer resident.