128 



THE OOLOGIST 



No. 172. Branta Canadensis can, 

 Canada Goose. Two females with two 

 breeds of young, about one-third grown. 

 Seen in the open fields. A band of 25 

 adult birds seen out on the lake. Not 

 common but breeds to some extent. 



No. 181. Olor buccinator. Trumpeter 

 Swan. One pair seen on the Blitzen 

 River. 



No. 187. Plegadis guarauna, White- 

 faced Glossy Ibis. Breeds in colonies 

 far out in the lake. Nests built in the 

 tules, generally green ones, about 

 three feet above the water. Birds 

 quite common and probably 100 pair 

 seen. 



No. 190. Botaurus lentiginosus, 

 American Bittern. Very common and 

 could be heard in all directions in the 

 open grass fields. 



No. 194. Ardea herodias herodias. 

 Great Blue Heron. Several colonies 

 out in the lake; one colony nesting 

 with the Egrets, and another colony 

 near the western end of the lake. 

 Nests are raised structures about two 

 feet high, and built up of dried tules. 

 Eggs two to four in number. Incuba- 

 tion far advanced a'nd almost all nests 

 had young birds June 3. 



No. 196. Herodias egretta, Ameri- 

 can Egret. Observations made during 

 a ten minute time allowance for visit- 

 ing this colony, disclosing the follow- 

 ing facts: Great Blue Herons and Eg- 

 rets breeding on the same ground 

 where without doubt, having a con- 

 stant battle. First we saw one adult 

 Heron and Egret dead near their 

 nests from a fight among themselves. 

 Fully half the young Egrets and 

 Herons were dead, several dead Grebes 

 and Ruddy Ducks were also living on 

 the island. The colony has about 35 

 pairs Egrets and 10 pairs Herons. 

 Nearly all nests had young, and I saw 

 only two nests of Egret with eggs, and 

 three nests of Heron with eggs. The 

 eggs of the Heron were infertile and 

 would not hatch. The entire destruc- 



tion which seemed to be going on, in 

 my opinion was due to a constant 

 fight between the Herons and Egrets. 

 Nests of the Egrets were similar to 

 the Herons. 



No. 202. Nycticorax nycticorax 

 naevus. Black-crowned Night Heron. 

 Nesting in colonies in several parts of 

 the lake on small tulie islands. Nest 

 built of dried tules, fastened to green 

 and dry tules about two feet above 

 the water. Eggs four in number and 

 nesting June 1. 



No. 206. Grus mexicana, Sand-hill 

 Crane. Half dozen pair seen near the 

 western end of the lake and probablv 

 breed in other locations of the reserva- 

 tion. 



No. 221. Fulica americana, Ameri- 

 can Coot. One of tlie most common 

 birds found. Breeding in large num- 

 bers in all parts. Nests made of dried 

 tules, and generally floating on the 

 water. Eggs seven to twelve. One 

 nest found containing 16 eggs. 



No. 223. Phalaropus lobatus, North- 

 ern Phalarope. One pair of this bird 

 seen on June 12, but nest not located. 



No. 224. Phalaropus tricolor, Wil 

 son's Phalarope. Very common in 

 many places, but not nesting on Juny 

 12. Females had partially developed 

 eggs. 



No. 225. Recurvirostra americana. 

 American Avocet. Very common, 

 breeding in large colonies of several 

 hundred birds. Nest generally a 

 slight depression in the ground lined 

 with fine grass. Eggs four in number. 

 Nesting about May 25 to June 10. 



No. 264. Numenius Americanus. 

 Long-billed Curlew. Not common, but 

 several pairs seen and known to breed. 



No. 331. Circus hudsonius, Marsli 

 Hawk. Quite common. Two nest-^ 

 with young found in tule patches. 

 Nests on the ground and built up of 

 dried tules and gra.ss. Young aboui 

 half grown on May 25. 



No. 342. Buteo swainsoni, Swain- 



