How I came to collude with a bird after being asked by the postal service to evict it: Phillip Morris
House sparrow - Wikipedia
Quit bird feeders. Add native plants to your garden instead - Los Angeles Times
How to Save Baby Birds, Action
RSPCA advice - what to do with baby birds found outside nest
Nature Notes: Baby Birds - The Post Newspaper
You Found A Baby Bird But Don't Know What To Do! - Wildlife SOS
Purple Martins: The Bird That Relies on Human-Built Nests - Cool Green Science
Outdoor Fun: 50 Bird Species and the Sounds they Make - Outdoor Benches for Park Activities
Not all baby birds need to be rescued – Orange County Register
Opinion Think Twice Before Helping That Baby Bird You Found - The New York Times