Calculators4 min
Air Purifier Sizing for a Bird Room: CADR by the AHAM Rule and by Air Changes
Two ways to size an air cleaner for a bird room, AHAM's two-thirds rule and the air-changes formula, with examples and the limits of CADR.
Pet bird cage buying guides
The straight answer onbird cages and aviaries
Which cage is big enough for a cockatiel, a conure or a macaw, what bar spacing keeps a parakeet in and its head out, and which perches, stands and lights the avian vets recommend. Every guide shows its sources and the sizing behind the pick.
Buying guide
Best Bird Cages for Parakeets (2026): Flight Cages That Meet the Minimums
Seven budgie cages measured against the Merck 20 x 20 x 30 and VCA 12 x 12 x 24 minimums and the 0.5-inch bar spacing, with who should skip each.
Guide
Bird Cage Size Guide by Species: The Veterinary Minimums, Side by Side
The Merck and VCA minimums for every common pet bird in one table, the wingspan rules behind them, and how to measure a cage against them.
Buying guide
Best Bird Cages for Cockatiels (2026): Measured Against the Vet Minimums
Six cockatiel cages against the Merck and VCA minimums, with the honest note that most 5/8-inch cages are wider-barred than Merck's figure.
Buying guide
Best Flight Cages for Birds (2026): Wide Cages Small Birds Can Fly In
Seven flight cages compared on flight length, bar spacing, gauge and price, from a $43 stackable box to an 80-inch parrot flight.
Specs from the source
Figures come from maker spec sheets and manuals, linked on the page.
A clear pick
Each guide names what we would buy, for whom, and what to skip.
Sources listed
Every guide ends with the documents it was built from.
Browse by category
Cages by BirdCages sized for parakeets, cockatiels, conures, greys, macaws, finches and more.Aviaries & Flight CagesIndoor flight cages, outdoor aviaries, stainless steel and multi-bird cages.Perches & StandsNatural perches, rope perches, play stands and travel carriers.Feeding & Care GearFeeders, water dispensers, lighting, air purifiers and cleaning supplies.Health & SafetyBar spacing, materials, placement, cleaning and the hazards to keep out of a bird room.CalculatorsCage size checker by species and air purifier sizing.Laws & DataQuaker parrot (monk parakeet) laws in all 50 states, each linked to the rule.
Latest guides
New and updated buying guides, comparisons and how-tos.
Laws & Data4 min
Are Quaker Parrots Legal in Your State? Monk Parakeet Laws, All 50
Twelve states ban Quaker parrots as pets, three require a permit and three attach conditions. Check your state, with the regulation linked.
Feeding & Care Gear7 min
Best Air Purifiers for Bird Dander (2026): Sized by CADR, Not by the Box
Three AHAM-rated HEPA purifiers sized to a bird room by CADR, the 2/3 rule applied to each, and the big-number units left out for publishing no CADR.
Feeding & Care Gear9 min
Best Bird Cage Cleaning Supplies (2026): Enzyme Sprays, Liners, Baths and Covers
Nine cleaning products judged on label directions, liners by size and count, baths and covers, plus the wash-rinse-disinfect-dry sequence from the sources.
Cages by Bird8 min
Best Bird Cages for African Greys (2026): Against the 40 x 30 x 60 Minimum
Seven grey and Amazon cages against the Merck 40 x 30 x 60 and VCA 36 x 36 x 48 minimums at 3/4 to 1-inch spacing, with where each falls short.
Cages by Bird7 min
Best Bird Cages for Conures (2026): Where Each Cage Falls Short of 36 x 24 x 48
Six conure cages against the Merck 36 x 24 x 48 and VCA 36 x 36 x 36 minimums, with the honest finding that most retail conure cages fall short.