Bird Food
Bread and Kitchen Scraps
Bread will not kill a bird that eats a crumb of it. The problem is what a diet built on bread displaces, how fast it molds, and what else it feeds.
The short answer
- Bread is not poison, but it is close to nutritionally empty and it displaces food that carries fat, protein and minerals.
- Bread put out in quantity molds within days, feeds rats and gulls, and turns a feeding spot into a neighbor problem.
- Angel wing is a wing deformity of growing waterfowl associated with high-carbohydrate diets. The association is well documented; the causal picture is not fully settled.
- Plenty of kitchen items are genuinely fine: unsalted nuts, plain cooked rice, chopped fruit, baked and crushed eggshell, and plain raw fat from the butcher in cold weather.
- Salt, mold, avocado, chocolate, caffeine, onion, raw dried beans and milk are the items to keep away from birds entirely.
- The idea that uncooked rice swells and kills birds is a myth, and it has been debunked repeatedly.
Almost everyone who feeds birds has thrown bread at some point, usually at ducks, usually as a child. The advice you now see is often absolute: bread kills birds. That overstates it, and overstating it makes the rest of the advice easier to ignore.
The accurate version is duller. A bird that eats a piece of bread is not being poisoned. A bird that eats mostly bread is eating something with plenty of starch and very little of anything else, and it is doing so instead of eating insects, seeds and fruit that carry fat, protein, calcium and trace minerals. In a wild adult with a big foraging range that is a wasted meal. In a growing bird, or in a park population where hundreds of people are throwing bread into the same pond, it is a real problem.
This page covers bread specifically, the waterfowl question, and the wider matter of kitchen scraps, which is where most of the useful answers actually live. For the broader list of things that should never go in a feeder, including the ones people offer on purpose, see what not to feed birds.
The honest answer on bread#
White bread is roughly starch, water and salt. It is low in fat, low in usable protein for a bird, and effectively empty of the calcium and micronutrients that matter most during breeding and growth. Whole grain bread is marginally better and still not food you would choose for a wild bird.
Three things follow. First, displacement: a bird that fills up on bread has less appetite and less time for food that carries what it needs. Second, spoilage: bread holds moisture, and a soggy crust on the ground grows mold within a day or two in warm weather, which is a genuine health risk rather than an aesthetic one. Third, everything else that eats it. Bread on the ground is the single most effective rat attractant a yard can have, as covered in mice and rats, and it draws gulls, starlings and pigeons in numbers that push smaller birds out.
So the rule is not never. The rule is that bread should not be a meaningful part of what you put out, should never go in quantity on the ground or into water, and should be replaced by something better if you actually want to feed birds.
It is not poison, it is a wasted meal
A crumb of bread does no harm. A diet of bread does, and a pond where hundreds of people throw bread produces exactly that diet. The right response is not panic about a single sandwich crust; it is to stop treating bread as bird food.
Angel wing in waterfowl: what is and is not established#
Angel wing, also called slipped wing or carpal droop, is a deformity in which the last joint of a young waterfowl's wing twists outward so the flight feathers stick out sideways instead of folding against the body. Once the bones harden the condition is permanent, and an affected bird usually cannot fly.
It is reported disproportionately in ducks and geese in urban parks and other places where people feed them heavily, and it is widely associated in the veterinary and wildlife literature with diets high in carbohydrates and protein relative to what a growing waterbird would normally eat. The proposed mechanism is that a high-energy diet drives the wing to grow faster than the joint and its supporting tissue can carry, so the weight of developing primaries twists it outward.
Be careful about how firmly that is stated. Most of the evidence is observational: affected birds turn up where people feed, and the deformity is rare in wild populations that are not fed. There is supporting work in captive and farmed waterfowl linking rapid growth on high-energy rations to the same deformity, and there are also proposals that genetics, incubation conditions and other nutritional factors including vitamin D, vitamin E and manganese play a part. The causal picture is not fully settled, and anyone telling you bread definitively causes angel wing is going further than the evidence does.
What that changes in practice is nothing. The precautionary case is strong, the alternatives are easy, and a duck pond is exactly the setting where the risk concentrates. Do not feed bread to waterfowl. If you want to feed ducks and geese, cracked corn, oats, chopped lettuce, peas and defrosted frozen corn are all better, and cracked corn is cheap.
Do not feed waterfowl at all where signs say not to
Many parks, reservoirs and municipal waters prohibit feeding waterfowl, usually because of water quality, disease transmission in crowded flocks, or birds that stop migrating. Those restrictions are generally well founded. The wider question of local rules is covered in neighbors and ordinances.
Feeding ducks and geese without bread#
If the ritual matters to you, keep the ritual and change the food. Ducks and geese take cracked corn, whole oats, birdseed, defrosted frozen peas and corn, chopped lettuce and other leafy greens, and duck pellets from a feed store. All of them are closer to a natural diet than bread and none of them turn the water into a slick of soggy crusts.
Two rules matter more than the menu. Feed on the bank rather than into the water, because uneaten food in a pond fuels algae and fouls the water the birds live in. And feed small amounts: a park flock that expects food gathers in unnatural densities, which is how avian disease moves through waterfowl. Where a site prohibits feeding, that is usually why.
Who scraps actually attract#
The species that dominate a scrap tray are rarely the ones people are hoping for. Bread, pasta, cereal and cooked leftovers are exactly the food that suits generalists: starlings, house sparrows, grackles, crows, pigeons and gulls. Chickadees, finches, nuthatches and woodpeckers largely ignore them.
That is worth knowing before you start, because a scrap tray can change the composition of your yard in a fortnight and be hard to undo. It also compounds the rodent issue: a food source that gets picked over slowly by large flocks leaves more on the ground at dusk than a seed feeder does. If you want the smaller birds, the answer is fat, sunflower and peanuts, not leftovers.
Kitchen scraps: the sorted list#
This is the part worth keeping. Plenty of ordinary kitchen items are genuinely useful to birds, several are harmless but pointless, and a short list should never go outside at all.
| Item | Verdict | Notes |
|---|---|---|
| Unsalted nuts, chopped | Fine | High fat and protein; walnuts, pecans, almonds, peanuts. Never salted, never seasoned |
| Plain cooked rice, white or brown | Fine | No salt, no butter. Small amounts, cleared daily |
| Uncooked rice | Fine | The story that it swells and kills birds is a myth |
| Chopped fruit: apple, pear, grape, melon, berries | Fine | Remove apple seeds and stone-fruit pits; see fruit for birds |
| Crushed eggshell, baked first | Fine | Bake at 250F (120C) for 20 minutes, then crush small |
| Plain raw beef fat or suet from a butcher | Fine in cold weather | Under about 50F (10C) only; it goes rancid in heat |
| Rolled oats, dry and plain | Fine | Offer dry, not cooked into a paste that sticks to bills |
| Air-popped plain popcorn | Fine | No butter, no salt, no flavoring |
| Unsalted pumpkin and squash seeds | Fine | Rinse, dry, and offer whole or crushed |
| Plain cooked pasta or potato | Marginal | Harmless but nearly empty; spoils quickly and draws rodents |
| Unsweetened, unsalted breakfast cereal | Marginal | Better than bread, still mostly starch |
| Bread, crackers, cake, pastry | Marginal at best | Tiny amounts only, never in water, never in quantity |
| Hard cheese in small crumbs | Marginal | Some birds take it; salt content and spoilage are the problems |
| Bacon fat, drippings, cooking oil | Avoid | Salt, nitrites and soft fats that smear and ruin feather insulation |
| Anything salted or seasoned | Dangerous | Birds have very limited capacity to excrete excess sodium |
| Anything moldy | Dangerous | Mold on food can produce toxins; see moldy seed |
| Avocado | Dangerous | Persin is toxic to many bird species; do not risk it |
| Chocolate and cocoa | Dangerous | Theobromine and caffeine are toxic to birds |
| Coffee, tea and other caffeine | Dangerous | Affects heart rhythm; no safe reason to offer it |
| Onion, garlic, chives, leeks | Dangerous | Sulfur compounds can damage red blood cells |
| Raw dried beans | Dangerous | Raw kidney and related beans contain a toxic lectin |
| Milk and cream | Dangerous | Birds do not digest lactose and it causes severe gut upset |
| Alcohol and anything with xylitol | Dangerous | No safe amount |
The dangerous list, explained#
Four of those entries deserve more than a table cell, because they are the ones people get wrong with good intentions.
- Salt. Songbirds have limited ability to excrete excess sodium, and salted nuts, chips, pretzels and salted popcorn are concentrated. This is also why bacon fat and most table drippings belong in the trash rather than a suet feeder.
- Mold. Moldy bread, moldy fruit and moldy seed can carry fungal toxins, and some cause fatal respiratory disease in birds. Nothing visibly moldy should ever go out, and the same rule applies to your seed bin, as set out in moldy seed.
- Milk and dairy. Birds are not equipped to digest lactose. Small crumbs of hard cheese, which is very low in lactose, are widely tolerated, but liquid milk causes serious gut upset and there is no reason to offer it.
- Avocado. The evidence is strongest from pet birds, where avocado has caused deaths, and the toxin persin is present throughout the fruit. There is no need to test whether wild species are equally sensitive.
Note what is not on the dangerous list: peanut butter, which is fine as long as it is unsalted and contains no xylitol, and uncooked rice, which does not swell in a bird's stomach and has never been shown to harm birds. Both myths persist because they sound plausible.
How to serve scraps if you serve them#
Serving method decides whether a scrap is a benefit or a rat problem, and it is where most of the practical difference lies.
- Put scraps on a tray or platform, not on the ground. A platform feeder can be cleared and cleaned; a lawn cannot.
- Chop everything small. A bird that cannot swallow a piece will drop it, and dropped food is what rodents collect.
- Offer a quantity that disappears within a day. Anything left at dusk should be picked up before dark, which is the single most effective rodent control there is.
- Keep fruit and fat separate from seed, so wet food does not spoil dry food.
- Wash the tray. Scraps foul a surface faster than seed does, and the method in how to clean a feeder applies to trays too.
- Stop entirely in hot weather if you cannot keep up with the cleaning.
Eggshell is the one scrap worth a specific routine. Rinse the shells, bake them at 250F (120C) for about 20 minutes to kill any salmonella, crush them to pieces smaller than a fingernail, and offer them on a dry tray in spring when laying females need calcium. The full reasoning is in grit and calcium.
Fat is the scrap worth saving
If you want one kitchen item that genuinely helps birds, it is plain unsalted raw fat from a butcher in cold weather. It is the same thing as commercial suet, it costs very little, and it does what bread cannot. The suet guide and homemade suet recipes cover rendering and the temperature limits.
Better uses for the leftovers#
Most of what people want to give birds is better handled another way. Stale bread goes in the compost or the trash, not the yard. Fruit that is going over is genuinely useful and is the one leftover birds compete for, especially with orioles, catbirds, mockingbirds and waxwings, which is covered in fruit for birds.
Vegetable trimmings, on the other hand, are close to useless as bird food but excellent as habitat input. A compost heap generates insects, and insects are what most feeder birds actually want to feed their young. The same logic applies to a brush pile built from prunings: it produces invertebrates and cover, which between them do more for your local birds than any scrap you can put on a tray.
If your instinct is that food should not be wasted, the honest translation is this. Feed the birds fat, seed, mealworms and fruit because those are the things they need, and let the starch go to the compost. That is not a stricter rule than the one you already follow in your kitchen.
Frequently asked questions#
Is bread bad for birds?
It is not poison, but it is close to nutritionally empty. Bread supplies starch and little else, so a bird filling up on it misses out on fat, protein and calcium. It also molds fast, feeds rats and gulls, and pushes smaller species away. A crumb is harmless; making bread a regular offering is not.
Does bread cause angel wing in ducks?
Angel wing is strongly associated with high-carbohydrate diets in growing waterfowl, and it is reported disproportionately where people feed ducks heavily. Most of that evidence is observational, and genetics and other nutritional factors have also been proposed, so the causal picture is not fully settled. The precautionary answer is clear: feed cracked corn, oats or peas instead.
Can birds eat uncooked rice?
Yes. The claim that uncooked rice swells inside a bird and kills it is a myth with no support. Rice is a modest food nutritionally, cooked or raw, and plenty of wild birds eat rice in fields. Offer it plain and unsalted, in small amounts, on a tray you can clear.
What kitchen scraps are safe for birds?
Unsalted chopped nuts, plain cooked rice, dry rolled oats, chopped fruit, unsalted pumpkin seeds, plain air-popped popcorn, baked and crushed eggshell, and plain raw beef fat in cold weather. Serve them on a tray, chopped small, in amounts that disappear the same day.
Can I put peanut butter out for birds?
Yes. Plain unsalted peanut butter with no xylitol is a good high-fat food, and the old worry about birds choking on it is not supported. Mix it with cornmeal or oats if you prefer a firmer texture, and avoid it in hot weather when it goes soft and rancid and can smear feathers.
Is bacon fat safe to use as suet?
No, avoid it. Bacon fat carries salt and curing compounds that birds handle poorly, and it stays soft at temperatures where beef suet is firm, so it smears on feathers and damages their insulation. Plain unsalted beef fat from a butcher does the same job properly.