* Length: 3.5-4 inches (9-10 centimeters)
* Weight: 1-2 ounces (28-57 grams)
Nestling
* Length: 5-6 inches (13-15 centimeters)
* Weight: 2-3.5 ounces (57-99 grams)
Adult:
* Length: 18-30 inches (46-76 centimeters), depending on the species
* Weight: 1-3 pounds (0.5-1.4 kilograms), depending on the species