50 IOWA ACADEMY OF SCIENCE Vol. XXVI, 1919 



In the fall flocks of considerable size are often seen sweeping 

 back and forth over the country. On August 19, 1914, fifty-eight 

 birds were counted in such a flock. 



88. Chcetura pelagica. Chimney Swift. An abundant summer 

 resident from April 22 to October 1. The only nest seen was one 

 found in June, 1914, in the chimney of a small cottage. It con- 

 tained two young at the time of my visit. 



89. Arc liiloc hits colubris. Ruby-throated Hummingbird. A 

 tolerably common summer resident from May 7 to September 27. 

 During September flocks of from four to six were frequently found 

 in a small swamp north of the cemetery at Marshalltown. I never 

 found the nest of this species in the county. On June 25, 1915, 

 at Mormons Ridge a pair were found about a group of three or 

 four oaks. Their behavior indicated that they had a nest in the 

 vicinity, but it could not be found. On June 30 this pair was ac- 

 companied by a third, — evidently a young bird, as they flew about 

 this grove. 



90. Tyrannus tyrannns. Kingbird. An abundant summer resi- 

 dent from May 2 to September 1. The kingbird nests more often 

 in the groves about farmyards than anywhere else. This is another 

 common species whose nests the writer neglected to note in the 

 majority of cases. One nest containing four eggs was found June 

 6, 1913, and on July 4, 1915, a pair were discovered building a nest. 

 This nest contained three eggs when visited again on July 16. 



91. Myiarchits crinitus. Crested Flycatcher. The crested fly- 

 catcher is a common migrant and tolerably common breeding species 

 from May 3 to September 7. A pair regularly built among some 

 giant cottonwoods in the Iowa river bottom but the nest was not 

 examined owing to its height. On June 20, 1914, a nest containing 

 eggs was pointed out to be me by a small boy. This nest was 

 closely watched and the results of the study have been reported 

 elsewhere.- 



92. Sayornis phoehc. Phoebe. A common summer resident 

 from March 28 to October 12. A pair of phoebes nested every year 

 in a vault in the Marshalltown cemetery. This pair had a completed 

 nest May 4, 1913, as did another pair nesting under a bridge. On 

 April 9, 1914, this pair was back again and starting to carry building 

 material into the vault. No note was made of the 1915 dates. A 

 new nest was constructed each year and from the number of frag- 

 mentary nests found in this vault they had been breeding there for 



.,.J9,^*'^'^'^°"'^^''^- ^^ "^^^ Home of the Great Crest: Wilson Bui., Vol. 

 XXVI, No. 4, December, 1915. 



