Jones — On IjIrds of Cedar Point. 



67 



more usvial. It is uext to impossible to get oue of these birds to rise 

 from the water. Imt tlie.v dive on the least pretext, and may remain 

 hidden with only tlie bill showing for long periods. On the Oberlin 

 Water Works reservoir they often remain for weeks at a time, but 

 seem never to become accustomed to the presence of iieople un thr 

 bank. 



The median date of arrival at Oberlin is April 8. the earliest being 

 May 28, 1904. At Cedar Point the median date of arrival is March 

 10, the earliest being March 16, 1907. They first reach Oberlin about 

 October 1, and the last leave Cedar Point about November 4. At 

 any time during the periods of migration one or two may be found 



Fig. '2. The I>nne Section, looking southwards from the Lake 

 Laboratory. To the left are the dunes and the blowouts, tlie lake in 

 the distance. Between the dunes and the bay on the right is the for- 

 est strip, here mainly consisting of the riiniis-Acer and AiUnithuH 

 formations. (Photo by Professor Herbert Osborn.) 



on the smallest and most insignificant ponds, where it is an easy 

 matter to make a hand capture, the birds not being able to get un- 

 der way in flight from so small a water area, and of course unable 

 to escape by diving in a few inches of water. 



3. Gavia immer. — Loon. 



Always scarce, even at Cedar Point, so that migration dates an 

 unreliable. One or two are usually found on the Oberlin Watei 

 Works reservoir about the middle of April, remaining from one to 



