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This work by Matthew Wills is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.
Backyard and Beyond
Starting out from Brooklyn, an amateur naturalist explores our world. "The place to observe nature is where you are."—John Burroughs
This work by Matthew Wills is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 3.0 United States License.
Backyard and Beyond 
I wonder about the toxic intake from the fires added to the usual poisons we spew into the environment. The incredible efficiency of bird respiration combined with the oxygen demand of flight has to mean they take in a lot more of that stuff per pound of body mass than we do. Do birds get asthma or COPD?