Double-crested cormorant
Chapter 2: Birds and Their Sounds
Subchapter: Birds without a song just call
From page 13 in the book.
Photo by Laure Wilson Neish
♫35. Waking calls in the roost, sounding more than a little like grunting pigs. February 28, 2006. Anhinga Trail, Everglades National Park. (0:56)