Housing requirements for bird species vary significantly based on their size and activity level. Small birds like finches and canaries need ample space for flying, typically a minimum of 18x18x24 inches. Medium-sized birds, such as parakeets and cockatiels, require larger cages, around 24x24x30 inches, to accommodate their active nature. Large birds, including parrots and macaws, need even more space, with minimum cage dimensions of 36x24x48 inches, allowing for climbing and wing-flapping. Additionally, all cages should include horizontal bars for climbing and be wide enough to prevent wing damage. Consult species-specific guidelines for optimal living conditions.