Problem Solving
My Feeder Empties Overnight
A feeder that goes from full to empty between dusk and dawn has a short list of suspects. Each one leaves different evidence on the ground, the pole and the feeder itself.
The short answer
- Overnight emptying is nearly always a mammal or a leak. Birds do not feed after dark, so anything that disappears between dusk and dawn narrows the list immediately.
- Look at the ground first. Scattered seed means an animal fed messily, a neat pile under the feeder means the seed ran out of a hole, and no seed at all means it was carried off.
- Raccoons empty feeders wholesale, often knocking them down. Deer drain hanging feeders while standing, leaving a clean feeder swinging. Squirrels chew ports and work at dawn and dusk rather than midnight.
- A widened port or a cracked base plate dumps a full feeder onto the ground in one wet night with no animal involved.
- One night with a phone camera or a trail camera answers the question faster than a week of guessing.
Birds do not feed after dark. So a feeder that was full at dusk and empty at dawn has been emptied by a mammal, or it has leaked. That single fact cuts the suspect list down to about six.
The evidence is on the ground and on the hardware, and each raider leaves a different pattern. Seed flung several feet in every direction is not the same as a tidy cone directly under the ports, and a feeder swinging undamaged is not the same as one lying in the grass with the lid off.
This page walks through the diagnosis in order: confirm the timing, read the ground, check the feeder for faults, then match the pattern to the animal and apply the fix.
First, confirm it really is overnight#
Before you buy a trail camera, make sure the disappearance is happening after dark rather than at first light.
Fill the feeder and mark the level with a strip of tape. Check it at dusk, then again the moment it gets light, then again at mid-morning. If the drop happens between the dawn check and mid-morning, you have squirrels, jays or simply heavy bird traffic, not a night raider.
Heavy legitimate traffic surprises people. A flock of pine siskins or a family of blue jays can strip a tube in a morning, and jays in particular carry seed away to cache it, which looks like theft because it is.
Read the ground#
| What you find | Most likely cause | Confirming sign |
|---|---|---|
| Seed scattered widely, feeder askew or on the ground | Raccoon | Muddy hand-like prints on the pole, lid off, parts bent |
| Feeder emptied cleanly, nothing on the ground, no damage | Deer | Split-hoof prints, browsed shrubs, feeder still swinging |
| Neat cone of seed directly beneath the ports | Leak or widened port | Chew marks on the port collar, cracked base |
| Hulls and shells everywhere, chewed plastic | Gray or fox squirrel (daytime) | Gnaw marks, feeder emptied at dawn or dusk |
| Seed gone, no mess, no damage, no prints | Flying squirrel | Only confirmed with a camera or a flashlight at 10 pm |
| Small droppings and runways in the grass below | Mice or rats | Tunnels in snow, holes near the foundation |
| Whole feeder missing or crushed | Bear | Claw marks, flattened vegetation, bent pole |
If you are in bear country, stop diagnosing and read bird feeders and bears first. A bear is the one suspect that changes the priority from seed to safety.
Read the ground before you buy anything
Every fix on this page costs time or money, and the wrong one costs both. Ten minutes with a flashlight around the base of the pole usually identifies the animal.
Raccoons#
Raccoons are the most common overnight raider in most of the country. They climb anything, they have hands, and they open feeders that squirrels cannot.
The signs are unmistakable: feeders knocked down or hanging crooked, lids removed and dropped nearby, seed everywhere, and five-toed prints that look like small handprints in mud or dust.
The fix is a smooth pole with a large baffle, higher than the squirrel version. Raccoons are heavier and longer, so a baffle needs to sit with its top at least 4.5 feet (1.4 m) up and be wide enough that a raccoon reaching over it cannot touch the feeder. Full specifications are in keeping raccoons off bird feeders and baffles: types, sizing and placement.
Bringing feeders in at dusk works even better and costs nothing.
Deer#
Deer empty hanging feeders with almost no evidence, which is why they are so often missed. A standing whitetail reaches a feeder at 5 or 6 feet (1.5 to 1.8 m) without effort, and they will drain a hopper in minutes while leaving the feeder swinging and undamaged.
Look for split-hoof prints in soft ground, browse lines on nearby shrubs, and droppings. The fix is height and clearance: hang feeders at 7 to 8 feet (2.1 to 2.4 m) with the feeder itself out where a deer cannot reach around a pole, and consider bringing them in overnight during winter when deer are hungriest. See deer eating bird seed for the placement details and the reasons feeding deer is a bad idea beyond the seed cost.
Flying squirrels#
Across much of the eastern United States and parts of the Northwest, flying squirrels are common and almost never seen. They are strictly nocturnal, quiet, and small enough to get into feeders that exclude gray squirrels. A feeder emptied overnight with no damage, no mess and no prints is the classic signature.
Go out at 9 or 10 pm with a flashlight and look at the feeder directly. If they are there, you will see large dark eyes reflecting back. Most people find they enjoy having them and simply add a second feeder, though the same baffles and overnight take-down that stop other climbers work here too.
Mice and rats#
Rodents work the ground under the feeder, but they will also climb a pole and enter a feeder tray. The clues are droppings, worn runways through grass, tunnels under snow, and gnawed corners.
Rodents are a reason to fix the spillage as well as the feeder: seed on the ground is what sustains a population. Clear the ground, use no-mess or hull-free seed, and read rodents under bird feeders and seed mess, hulls and dead grass.
Never poison or use glue traps
Rodenticide moves up the food chain: poisoned rodents are eaten by owls, hawks and cats, and secondary poisoning kills raptors regularly. Glue traps catch songbirds, chipmunks and snakes indiscriminately and cause prolonged suffering. Remove the food source instead, which works better and permanently.
When it is not an animal at all#
Before blaming wildlife, rule out the feeder itself. A leak can empty a full tube in one night.
- Widened ports. A squirrel gnawing a plastic port collar turns a 3/8 inch (10 mm) hole into an open wound that pours seed. Look for tooth marks and a ragged edge. Metal port collars prevent this, as covered in tube feeders.
- A cracked or warped base plate. UV and freeze-thaw cycles split plastic, usually along a seam. Hold the base up to the light.
- A base that is not seated square. Cross-threaded or clipped in on one side only, so seed trickles out of the gap all night.
- Wet seed swelling. Damp seed expands inside a tube and can push a base plate open. This overlaps with moldy, clumped or wet seed.
- Wind. A feeder swinging hard in a gale throws seed out of the ports. If your losses correlate with weather, that is the answer.
Checking these is a five minute job at the next refill, and it is covered as routine in feeder repair and maintenance.
One night of video ends the argument
Prop a phone on a windowsill facing the feeder, set it recording, and leave a porch light on low. It is not elegant but it works, and it saves weeks of guessing. An inexpensive trail camera strapped to the pole at feeder height does the same job better and can stay out all season.
The fixes, ranked#
- Bring feeders in at dusk. Free, immediate, and effective against every nocturnal raider including bears. Birds lose nothing.
- Smooth pole plus a correctly sized baffle. The permanent answer for raccoons and climbing rodents, and it fixes daytime squirrels at the same time. Details in baffles.
- Raise the feeder to 7 feet (2.1 m) or more. Removes deer and improves everything else. See how high should a bird feeder be.
- Repair or replace the leaking feeder. Cheap, and the most commonly missed cause.
- Clear the ground and cut the spill. Removes the incentive for rodents and reduces raccoon interest. Catch trays and hull-free seed both help.
- Reduce fill volume. Put out only what the birds will eat in a day, so there is nothing worth raiding after dark.
Poisons, traps, greased poles and repellent sprays are not on that list. Grease and oil destroy feather waterproofing, poison moves through the food chain, and most trapping of wildlife is regulated by state law.
A routine that ends overnight losses#
- Fill feeders in the morning with one day's worth of seed.
- Bring everything in at dusk from spring through fall, when raccoon and bear activity peaks, and in winter if deer are the problem.
- Keep feeders on smooth poles with baffles, 10 feet (3 m) from any launch point, rather than hanging from tree limbs.
- Sweep or rake spilled seed twice a week and store the supply in a sealed metal or hard plastic container, as described in storing bird seed.
- Inspect ports, base plates and gaskets at every refill.
- If losses continue after all that, run a camera for one night. The answer will be on it.
Frequently asked questions#
What is emptying my bird feeder at night?
Raccoons and deer are the two most common overnight culprits, with flying squirrels, mice and rats accounting for many of the rest. Raccoons usually leave the feeder crooked, dented or on the ground and the seed scattered widely. Deer drain hanging feeders cleanly while standing, leaving hoof prints and no mess. A trail camera or a phone propped in a window settles it in one night.
Do squirrels raid feeders at night?
Gray and fox squirrels are strictly daytime animals and sleep through the night, so a feeder emptied after dark is not them. Flying squirrels are nocturnal, common across much of the eastern and northwestern United States, and will quietly empty a feeder without a sound. If your seed vanishes overnight and you find no damage or mess, flying squirrels are worth considering.
How do I know if deer are eating my bird seed?
Look for split-hoof prints in soft ground, a feeder that has been emptied without being damaged or knocked askew, and browsing damage on nearby shrubs. Deer can reach a feeder hanging at 5 feet (1.5 m) easily and will drain it in a few minutes. Raising feeders to 7 feet (2.1 m) or more with the pole set away from anything they can reach around usually solves it.
My feeder is empty but there is a pile of seed underneath. Why?
That is almost always a leak, not an animal. Check the ports for chew damage that has widened the opening, look for a cracked or warped base plate, and check that the base is seated squarely. Wet seed swelling inside a tube can also force the base open. A single overnight rain can dump several pounds of seed straight through a fault like that.
Should I bring bird feeders in at night?
It is the single most effective answer to most overnight raiding, and it takes about a minute. Bring feeders in at dusk and put them out at dawn: birds do not feed at night anyway, so nothing is lost. It also reduces rodent activity and is standard practice in bear country.
How much seed should a feeder actually use in a day?
It depends on traffic, but a busy yard in winter can genuinely get through a couple of pounds a day across several feeders, and a single tube can empty in a day when a flock of finches or a group of jays finds it. Watch for a couple of hours in the morning before assuming a raider: heavy legitimate traffic is common and often invisible if you only check the feeder twice a day.