Falconry Mews Requirements: Space, Inspection, and Penalties

Falconry mews requirements come from federal rule 50 CFR 21.82, which sets standards for an indoor enclosure (the mews), an outdoor weathering area, and a short list of required equipment. Before you can acquire your first raptor, a state, tribal, or territorial wildlife official has to inspect the setup and certify that it meets those standards. The facility then stays subject to unannounced inspection for as long as you hold a permit.¹

Indoor Mews Standards

The indoor facility is where the bird lives most of the time, and the rules focus on space, safe surfaces, perching, and light.

Space to Bate and Move Safely

Each raptor needs room to fully extend its wings and bate — attempt to fly while tethered — without damaging feathers or striking walls, the ceiling, or another bird. If a raptor is housed untethered, the space has to be large enough for actual flight. The mews also needs to be big enough that you can get in and out comfortably for feeding and cleaning.¹

For untethered birds, every wall that isn’t solid has to be protected on the inside with suitable material. Vertical bars spaced narrower than the width of the smallest raptor’s body work, and so does heavy-duty netting.² The point is to keep a bird from flying into an opening or getting tangled during a bate. Avoid exposed beams or ledges that could tempt a bird to fly to an unsafe height.

Perches and Sunlight

The regulation requires a suitable perch for each raptor and at least one opening for sunlight.¹ Common styles include screen perches (a padded horizontal bar with cloth draping down both sides), round perches (a padded barrel-shaped structure), and shelf perches (a small padded ledge mounted from the wall, often paired with a block perch on the floor). Which one fits depends on the species and whether the bird is tethered or free-lofted.

Shelf perch enclosures where raptors are tethered side by side are an acceptable indoor configuration, and other innovative housing systems are allowed if they protect the birds and maintain healthy feathers.² If untethered raptors are housed together, they have to be compatible; preventing injuries from aggressive or territorial pairings is your responsibility.¹

Climate, Predators, and Flooring

Every facility, indoor or outdoor, must protect raptors from the environment, predators, and domestic animals.¹ The structure has to be solid enough to keep out raccoons, cats, and owls. It also needs adequate ventilation while staying relatively free from drafts in extreme weather. Some species tolerate cold well; others may need supplemental insulation, heating, or cooling depending on the climate. A hardy red-tailed hawk doesn’t need the same temperature control as a tropical species.

Flooring should support easy cleaning and drainage. Pea gravel, rubber matting, and finished concrete are widely used because they resist moisture buildup. Bare wood shavings and similar organic substrates can harbor mold and bacteria, which creates respiratory risks like aspergillosis, a fungal infection that is among the most common causes of death in captive raptors.

Outdoor Weathering Area

The outdoor facility gives the bird fresh air and direct sunlight, both of which matter for feather condition and overall health. Federal standards require the outdoor enclosure to be totally enclosed. Acceptable materials include heavy-gauge wire, heavy-duty plastic mesh, slats, pipe, or wood.¹

The enclosure must be covered on top, with at least one covered perch that protects the bird from predators and weather. It also has to be large enough that a raptor flying from its perch cannot strike the walls.² In practice, most falconers size the area so the bird has a comfortable radius beyond its full wingspan in every direction when tethered.

Balance sun and shade. Part of the covered area should block direct sun so the bird can cool down; raptors overheat faster than most people expect. Drainage matters too. Standing water breeds parasites and creates the damp conditions that cause foot infections like bumblefoot. Screen mesh to block mosquitoes isn’t federally required, but it’s a smart addition where West Nile virus is prevalent.

Equipment You Need on Hand

Before the facility can be certified, you have to have the following equipment ready:

Jesses, or materials to make them. These are leather or synthetic leg straps that let you tether the bird to a perch or your glove, sized to the raptor’s legs to avoid constriction.
A leash and swivel. The leash connects to the jesses through a swivel, which keeps the line from tangling when the bird rotates on its perch.
A bath container. A shallow basin where the bird can bathe. Frequent bathing keeps feathers in hunting condition and hydrates the skin.
Appropriate scales or balances. Precise weight monitoring is how falconers track health and hunting readiness; even a small change can signal illness or a shift in condition.

The federal rule doesn’t specify exact dimensions for the bath container or a precision threshold for the scale. It requires “appropriate scales or balances” and a “bath container,” leaving the specifics to the falconer’s judgment and the inspecting officer’s approval.¹ Most experienced falconers use a gram-accurate digital scale and a bath pan wide enough for the bird to dip its breast feathers. Your state may impose more specific standards, so check with your wildlife agency.

On food handling, the regulation doesn’t spell out detailed requirements, but sanitation is part of the overall standard. Raptors eat whole prey — frozen quail, mice, day-old chicks, and similar items — so you need a dedicated freezer or at least a sealed section of your household freezer. Label and date frozen items, never refreeze thawed food, keep cutting surfaces separate from those used for human food, and clean feeding areas daily.

Temporary and Travel Housing

A permanent mews isn’t required every day of the year. When you’re traveling for hunting or otherwise away from home, your raptor can be housed in a temporary facility for up to 120 consecutive calendar days. The bird still needs a suitable perch and protection from extreme temperatures, wind, predators, domestic animals, and excessive disturbance.²

For actual transport between locations, a “giant hood” or similar container is acceptable. The same basic protections apply: a perch and shelter from temperature extremes and wind.¹ If you stay at a new location for more than 120 consecutive days, the facilities there must meet the full permanent standards and be listed on your permit.

Housing on Rented or Shared Property

If the mews sits on property you don’t own, you need a signed and dated statement from the property owner acknowledging that wildlife authorities may inspect the facilities and raptors at any reasonable time of day, with the property owner present. You also have to sign a separate statement agreeing that inspections can happen without advance notice, as long as you’re there. Officials cannot enter the facilities or disturb the birds unless you, the permittee, are present.²

The Inspection Itself

Once your mews, weathering area, and equipment are ready, you schedule an inspection with a representative of the state, tribal, or territorial agency that regulates falconry. The inspector verifies that the setup meets federal standards: door security, perch suitability, predator protection, required equipment on hand, and overall sanitation. If it passes, the inspector certifies the facility, and that certification becomes part of your permit application. No bird can be acquired until this step is complete.¹

There is no fixed re-inspection schedule. State or tribal officials may inspect your facilities without advance notice at any reasonable time of day, as long as you’re present. Equipment and records can be reviewed during business hours on any day of the week.¹ Keep a copy of your signed inspection report and current permit at the facility so it’s accessible if an officer shows up.

If You Move Your Facility

Relocate the mews and you have to notify your state, tribal, or territorial agency within five business days.¹ If the move takes you into a different state or territory and you stay more than 120 consecutive days, the new facility must meet the full federal standards and be listed on your permit. This is a common trip-up: the 120-day temporary housing allowance covers a transition period, not a permanent workaround.

Penalties for Skipping or Failing These Standards

Falconry operates under the Migratory Bird Treaty Act, and violating any provision of the Act or its implementing regulations is a federal misdemeanor. The maximum penalty is a fine of up to $15,000 and up to six months in jail.³ That reaches possessing a raptor without a permit, failing to maintain required facilities, and violating reporting requirements.

Permit revocation itself is handled by your state, tribal, or territorial agency rather than directly by the federal government.¹ Losing the permit means transferring your raptors to another legal permittee, an exempt institution, or releasing eligible birds to the wild. You cannot keep a bird without valid authorization.

1
eCFR. 50 CFR 21.82 – Falconry Standards and Falconry Permitting
2
eCFR. 50 CFR 21.82 – Falconry Standards and Falconry Permitting
3
Office of the Law Revision Counsel. 16 USC 707 – Violations and Penalties