181. Trumpeter swan. Olor buccinator. Rare migrant; not so common as preceding; breeds from Iowa and Dakota northward.
183. Roseate spoonbill. Ajaja ajaja. Accidental; two instances; habitat, tropical and subtropical America.
184. White ibis. Guara alba. Rare migrant; one taken on plains; habitat, tropical and subtropical America, coming north as far as Great Salt Lake and South Dakota.
[185.] Scarlet ibis. Guara rubra. Accidental; one specimen taken; a wonderful record for this tropical species.
186. Glossy ibis. Plegadis autumnalis. Accidental; two fine specimens taken in the State; this is far out of its ordinary tropical range.
187. White-faced glossy ibis. Plegadis guarauna. Summer visitor; rare; fairly common in New Mexico and Arizona; sometimes wanders into Colorado; Aiken found it breeding at San Luis Lakes.
188. Wood ibis. Tantalus loculator. Rare summer visitor; southern range.
190. American bittern. Botaurus lentiginosus. Common summer resident; breeds throughout the State, from plains to about 7,000 feet.
191. Least bittern. Ardetta exilis. Rare summer visitor; a few records east of mountains; one specimen seen west of the divide.
194. Great blue heron. Ardea herodias. Summer resident; common in migration; seldom goes far up in the mountains, though Mr. Aiken found one at an altitude of 9,000 feet.