As indicated in the Swallows Summary Table, the swallows of North America can be identified in 3 groups based on their coloration: rusty swallows, drab swallows and green swallows.
Comparisons
Swallow Comparisons
As indicated in the Swallows Summary Table, the swallows of North America can be identified in 3 groups based on their coloration: rusty swallows, drab swallows and green swallows.
Comparisons