Finches and canaries ask different things of an aviary than parrots do. They are small, active fliers that live in a flock, spend the day on the move between perches, feeders, and the floor, and need shelter from weather far more than they need toys. A good finch aviary is therefore designed around an unobstructed flight, a dry sleeping end, and security thoughtful enough that you stop worrying about what can get in.
Shape the space around flight
Length matters more than height or width. Give the birds a clear horizontal run with perches placed at each end, so they fly the full span rather than fluttering between perches crowded in the middle. Natural branches of varying thin diameters suit small feet, and a few shrubs in pots or a planted section inside the flight give cover that makes finches feel safe enough to use the whole space. Site the aviary where it catches morning sun but has shade through the hottest part of the day, and out of the wind's main path, because small birds lose body heat quickly in a cold draught.
Build the sheltered end properly
One end of the aviary should be roofed and walled on at least two sides, forming a dry, draught-free shelter where the whole flock can roost and where food stays dry. Put the main roosting perches in there, higher than the flight perches, since finches and canaries choose the highest safe spot at night. In colder spells this sheltered house is where extra protection gets added, and it should be easy for you to reach into for cleaning and catching a bird when needed without dismantling anything.
Security: mesh, floor, and the double door
Use fine, strong mesh with gaps small enough to keep out sparrows and mice as well as cats and larger predators, and check corners and joins where gaps hide. A solid or mesh-covered roof keeps wild bird droppings from falling into food and water. The floor should be easy to clean and hard to dig through — a solid base, or mesh laid beneath the surface, stops rodents tunnelling in and birds' food waste building up out of reach. Fit a double-door safety porch at the entrance: you step in, close the outer door, then open the inner one, so a fast finch flushing off a perch never has a straight line to the sky.
Feeding, water, and flock manners
Spread several feeding stations and drinkers around the aviary rather than one central dish, because flock birds squabble and the lowest-ranking finch must still eat in peace. Offer the seed or complete diet in the sheltered end, fresh water daily in shallow drinkers a small bird cannot fall into, and bathing water in a wide shallow dish — canaries in particular bathe enthusiastically and daily if given the chance. Introduce new birds only after a period kept separately and watched for signs of illness, and stock gradually, since an aviary filled all at once is harder to keep healthy and harmonious than one built up bird by bird.
When you want a second pair of experienced hands — for the build, for mesh and materials, or for reputable local birds — the KinsLe Pet Services Directory helps you find trusted local pet businesses and bird specialists and connect with them directly.