We usually consider 1 year for dog equals to 7 years for you. Similar to dogs, birds’ age should be viewed relative to its life span. Different bird species have different life span. Grey parrots have an average life span of 50 years, lovebirds have 10-15 years. I am using a bird with about 20 years’ life span as an example to show you how to estimate its age in human years. You can then estimate your birds’ in human years by proportion.
Care For Your Birds - Beginners' Guide【新手飼養雀鳥指南】 