494 



Gunthorp, Heronry on Lake Cormorant, Minn. 



[Auk 



Loct. 



large elm tree (4) near the south end of the heronry. In the 

 accompanying sketch the measurements between the trees were 



roughly paced off, the trees not 

 occupied by nests being omitted. 

 Also, the size of the trees is only 

 approximate, as no tape line nor 

 rule was available for more ac- 

 curate measurements. 



The shape of the whole group 

 is roughly a parallelogram with 

 the long sides extending some 

 one hundred seventy-five feet 

 north and south, while it is about 

 one hundred feet wide. From 

 the southeast corner of this ex- 

 tends a row of four trees, the 

 farthest one being one hundred 

 ten feet from the corner. All of 

 these trees are hard maple except 

 two, and vary in size from eight 

 to thirty-six inches, the majority 

 of them being twenty or more 

 inches in diameter. The two ex- 

 ceptions are elms, one (8) being 

 located in the northwest corner, 

 and the other (4) being the fourth 

 from the south end of the de- 

 tached line. Near the last-men- 

 tioned tree is the fallen trunk 

 of another elm of good size which 

 has been dead for some time and which blew over last spring. 

 Probably it held nests of the Heron at some past date, but not 

 last year, as no remnants of nests were in or near its fallen branches. 

 The hard maple (5) located at the southeast corner of the parallelo- 

 gram has two trunks of about the same size, twenty inches. 



The total number of nests in the trees and on the ground under 

 them numbered sixty-six. Eight of this number were on the 

 ground, but were in good condition, and had evidently been used 



Trees occupied by Herons. 



