Your use of either the General Depreciation System (GDS) or the Alternative Depreciation System (ADS) to depreciate property under MACRS determines what depreciation method and recovery period you use. You generally must use GDS unless you are specifically required by law to use ADS or you elect to use ADS.
The quetzal is a beautiful animal. Its scientific name is Pharomachrus mocino. Quetzals can be anywhere from 10-14 inches from bill to base of tail. The Quetzals are much larger than that though, because they have tails that may trail more than 3 feet behind their body.
They are just incredibly small compared to a full sized Macaw. The Hahn's is a mere 12 inches in length and weighs about 5 ounces. A cockatiel is only slightly smaller than a Hahn's. The Hahn's has a shorter lifespan than a standard sized Macaw, living an average of 30 to 40 years. To Maximize lifespan, feed your bird the best food possible, allow for adequate exercise, and interact with your bird for at least a few hours per day.