Convert bird years to approximate human equivalent years.
Birds age very differently across species. Large parrots (macaws, cockatoos) can live 60-80+ years — as long as humans. Small parrots (budgies) live 5-15 years, while chickens average 5-8 years. A rough human-equivalent conversion uses the ratio: human years = bird years × (80 / species lifespan). Birds age more slowly relative to body size than mammals due to higher metabolic efficiency and better DNA repair mechanisms. Signs of aging in birds: feather quality decline, reduced activity, cataracts, arthritis, and behavioral changes. Proper nutrition, mental stimulation, and regular veterinary care significantly extend avian lifespan. The oldest confirmed bird was a cockatoo named Cookie who lived to 83.