Our eastern birds have descended from cage birds release in 1940s in New York. At that time they were known as Hollywood Finches. The color variation of this bird have been documented by Cornell and are typically due to what they eat.
Nature inspires awe!
These are some papers that I refer to often:
"How can we be responsible stewards and conservators of threatened habitats when we do not even know the resident fauna?"
Dr. Dan Young
UW- Madison Entomology
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