20 The Wilson Bulletin — No. 70. 



peculiar inducements for the Passerine birds in either migra- 

 tion. As already pointed out, the topoo^raphy is sufficiently 

 diversified and the flora sufficiently rich to be attractive to the 

 nearlv two hundred species which are recorded in it each year. 

 Of these two hundred species considerably more than two- 

 thirds are Passerine birds, and of individuals considerably 

 more than three-fourths are Passerine birds. 



122. Tyrannus /yroHJU/s.— Kingbird. 



Only tolerably common over most of the region, occurring on the 

 larger islands where it breeds. One pair breeds regularly near the 

 Lake Laboratory, and about seven other pairs nest eastward on the 

 sand spit. The median date of arrival is April 29 ; the earliest be- 

 ing April 22: the latest May 11. 1908. My latest fall record is Sep- 

 tember 17. 1900. and 190G. Nest building begins during the second 

 decade of May. A student once brought me a nest of this bird with 

 an apple grown in from one side so that the nest cavity was nearly 

 obliterated. Evidently the birds had built the nest so that the wall 

 surrounded a small apple. Unoubtedly the young had grown large 

 enough to leave the nest before the apple began to pinch them. 



123. Mijiarchus rrii)itiis. — Crested Flycatcher. 



This is a familiar bird over the whole region, nesting in liollow 

 apple trees within two rods of occupied dwellings sometimes, and 

 it is also fairly common in most woods, where its challenging call 

 betrays its presence in the upper parts of the woods. Two or three 

 pairs breed on Cedar Point, necessarily where there are large trees, 

 but it is usually common on several days during the migrations in 

 spring. The median date of arrival is May 1, the earliest being 

 April 2"), 1899. and the latest ALiy 13. 1907. Miost fall departures 

 occur in the second week of September, the latest being the 14th, 

 1899. 



]j24. Sdi/oniis plioche. — Phoebe. 



Common over the whole region, but less numerous during the 

 breeding season on the sand spit because suitable places for nests 

 are few there except at the summer resort grounds. Hereabouts 

 its local name of Bridge Pewee is entirely appropriate, for nearly 

 every bridge harbors a pair. It is also found all along the stream 

 gorges, where it nests beneath overhanging banks or among the 

 rocks. There seems to be much less nesting about buildings thau 

 in many sections of the country, probably because suitable natural 

 nesting places are so abundant. The median date of spring arrival 

 is March 21, the earliest being March 14, 1903. the latest April 6, 



