OKLAHOMA ACADEMY OF SCIENCE 65 



1920 and another brood of fully grown young that were still begging 

 from their father on September 2, 1920. 



Blue Grosbeak (Guiraca caeriilea caerulea). Females have 

 been seen with food in their bills on July 17, 1922 and August 22, 

 1920. 



*Dickcissel (Spisa americana). A nest found May 15, 1921 

 contained two dickcissel eggs and one cowbird's ; this was later 

 found deserted. 



Purple Martin (Progne subis subis). In 1920 the martin box 

 on our grounds housed 4 pairs, in 1921 only one, while in 1922 none 

 favored us by nesting there. In 1920 one pair began to buiM April 

 16, but 3 pairs of young birds that arrived May 1, began to build 

 May 8 ; their young left July 27. In 1921 the martins began to 

 build April 7. 



*White-rumped Shrike (Lanius hidovicianus excubitorides) . 

 One nest has been found each year ; June 4, 1920 a nest contained 

 two young nearly ready to leave while two others had already left; 

 May 15, 1921 parents were feeding young in the nest ; April 2, 

 1922, a nest was found finished but empty, on May 2 it contained 

 5 blind, newly hatched young and one egg, and on May 22, 3 young 

 were seen near the empty nest. 



*Bell Vireo (Vireo belli belli). Seven nests were found, 5 of 

 which were failures, 3 on account of cowbirds, the other two nc^ts 

 being found destroyed. The earliest dates each year were: bird 

 seen with building material May 12, 1920 ; nest with one egg May 

 29, 1921 and a partly built nest May 14, 1922. Tht latest date on 

 which birds have been seen building was June 11, 1922. 



*Yellow Warbler (Dendroica aestiva aestiva). Two nests 

 found ; June 19, 1920, 3 young left their nest which had a cowbird 

 egg and warbler egg imbedded in its floor ; June 30, 1922 a nest 

 contained 3 sma'l warblers and a cowbird twice as big. A young 

 warbler recently out of the nest was seen June 19, 1922 and another 

 July 17, and a pair of warblers were observed feeding a young 

 cowbird July 11. 1922. 



Sycamore Warbler (Dendroica dominica albilora). A parent 

 bird was seen near the Canadian with insects in its bill July 8, 1922. 



^Western Mockingbird (Mimus polyglottos leucopterus). Eigh- 

 teen nests were found. The earliest dates were : nest in process of 

 construction, April 16, 1920 ; nest with 2 eggs, April 24, 1920 ; nest 

 with complete set of 4 eggs May 2, 1922. Late dates were : nest with 

 one egg, July 14, 1922; 4 young just hatched August 1, 1920 and 

 another brood that had left the nest but were being fed by their 

 parents August 20, 1920. 



