The howling of the wind.

October 5. 

The howling of the wind about the house just before a storm to-night sounds like a loon on the pond. How fit. 

H. D. Thoreau, Journal, October 5, 1853

Sounds like a loon on the pond. See October 3, 1852 ("Hear the loud laughing of a loon . . .A wild sound, heard far and suited to the wildest lake."); October 8, 1852 ("As I was paddling along the north shore, after having looked in vain over the pond for a loon, suddenly a loon, sailing toward the middle, a few rods in front, set up his wild laugh and betrayed himself"); October 19, 1859 ("C. says that he saw a loon at Walden the 15th.")