What Do Bluebirds Eat at Feeders? Mealworms & More

Published on September 18, 2026 • Last Updated on September 20, 2026

Quick answer: Bluebirds mainly eat insects and fruit, not the seed mixes that attract many familiar feeder birds. If you want to bring bluebirds to a feeder, mealworms are the most reliable food to try. Offer a small amount on a flat tray or in a specialized mealworm feeder, keep the food and feeder clean, and treat feeding as a supplement to insect-rich habitat and native fruiting plants.

This matters because a bluebird can be present in your yard and still ignore a perfectly busy sunflower-seed feeder. The problem may not be your feeder placement at all—the food may simply not match how bluebirds normally feed.

What bluebirds naturally eat

Eastern Bluebirds feed heavily on insects and other small invertebrates for much of the year. Cornell lists prey including caterpillars, beetles, crickets, grasshoppers and spiders. In fall and winter, fruit becomes much more important, including berries and fruits from plants such as sumac, dogwood, juniper, hackberry and wild holly.

Western Bluebirds follow a similar broad pattern: they are strongly insectivorous in summer, and Cornell specifically notes that they can be attracted to feeders with mealworms.

That gives you a better way to think about bluebird feeding: match the feeder to an insect-and-fruit eater rather than treating a bluebird like a finch or sparrow.

Mealworms are the best feeder starting point

Project FeederWatch describes mealworms as one of the only feeder foods that reliably attract bluebirds. Cornell also recommends mealworms for Eastern and Western Bluebirds and notes that they can be offered on a platform feeder.

Both live and dried mealworms are sold for bird feeding. The important point is not to turn supplemental feeding into an unlimited replacement for the birds’ natural diet. Start with a modest amount, observe whether local bluebirds discover it, and remove deteriorating food rather than continually topping up an old supply.

If you want a broader explanation of the food itself, see our guide to feeding mealworms to backyard birds.

Live vs. dried mealworms for bluebirds

Either form can be offered, but they solve slightly different practical problems.

• Live mealworms move, which can make them conspicuous to an insect-hunting bird. They require storage and must be contained so they do not crawl out of the feeder.
• Dried mealworms are easier to store and portion. They do not move, so a bird unfamiliar with the feeder may take longer to discover them.

There is no need to claim that one form is universally superior. If bluebirds already visit your yard, the more useful test is whether they actually take the food from your setup and whether you can keep that setup clean and manageable.

What kind of feeder works for bluebirds?

Project FeederWatch recommends a flat tray or specialized mealworm feeder. A simple platform makes the food visible and accessible. Specialized bluebird/mealworm feeders can help limit access by some larger birds, though feeder design varies and should not be treated as predator protection for a nearby nest box.

Put only enough food out that it can stay fresh. If rain repeatedly soaks dried food or debris and droppings accumulate, the setup needs attention rather than more food.

General feeder hygiene still applies. Our bird-feeder cleaning guide explains when to clean more aggressively and when a feeder should temporarily come down.

Why bluebirds often ignore ordinary birdseed

A tube feeder full of sunflower seed can be excellent for chickadees, finches and other seed-eating birds while doing very little for bluebirds. Cornell’s Eastern Bluebird guidance says the species does not often come to feeders unless mealworms are offered.

So if a bluebird sits on a fence near your feeder but never lands on it, do not immediately assume the bird is nervous or that the feeder is in the wrong place. It may simply be hunting insects in the lawn or looking for fruit instead of seed.

Fruit matters—but habitat may be better than a fruit dish

Fruit becomes an important natural food for Eastern Bluebirds in fall and winter. Rather than assuming that any kitchen fruit will reproduce that diet, a stronger long-term strategy is to provide region-appropriate fruiting plants that birds can use naturally.

Cornell documents Eastern Bluebirds eating fruits from plants including dogwood, sumac, hackberry, juniper and wild holly. Which native plants make sense depends on where you live, so use local native-plant guidance rather than planting an invasive species merely because its berries attract birds.

For a broader look at fruit-feeding species and safe feeder options, see what backyard birds eat fruit.

Feeding bluebirds during breeding season

Insects are central to a bluebird’s natural diet, and breeding raises the demand for protein-rich food. Cornell specifically highlights mealworms as an attractive supplemental food during this energy-intensive period.

But a feeder is only one piece of the system. Open habitat with suitable hunting perches, healthy insect populations and appropriate nest cavities can matter more than trying to supply every calorie yourself. Avoid unnecessary pesticide use if your goal is an insect-rich bird-friendly yard.

If you also provide a nest box, food does not replace correct nest-box design and placement. Our birdhouse entrance-hole guide covers species-specific dimensions, and the predator-guard guide covers nest-box protection.

Bluebirds are nearby but won’t use the feeder: what to check

• Check the food first. If you are offering only seed, try a small mealworm offering instead.
• Make the food easy to see. A flat tray is a straightforward starting point.
• Give them time to discover it. A new feeder is not automatically recognized as a food source.
• Keep the food fresh. Remove wet, moldy or deteriorating food.
• Look at natural food availability. Birds may prefer abundant insects or berries nearby.
• Do not mistake low feeder use for absence. Bluebirds commonly forage by dropping from a perch to the ground for insects.

A simple bluebird feeding setup

1. Confirm that bluebirds actually occur in your area and use your yard or nearby open habitat.
2. Put a small quantity of mealworms on a clean flat tray or suitable mealworm feeder.
3. Watch from a distance rather than repeatedly moving the feeder.
4. Remove old food and clean the feeding surface as needed.
5. Support natural food too: preserve insect habitat and consider appropriate native fruiting plants.
6. If the birds ignore the feeder but continue foraging naturally, accept that outcome. Supplemental feeding is optional.

The bottom line

If your goal is to feed bluebirds, start with mealworms rather than ordinary seed. Bluebirds are primarily insect-and-fruit eaters, and Project FeederWatch identifies mealworms as one of the few feeder foods that reliably attract them. Use a tray or specialized mealworm feeder, offer modest fresh portions, and support the natural insects and fruiting plants that make up the larger diet.

Sources & further reading

• Cornell Lab / All About Birds — Eastern Bluebird Life History
• Cornell Lab / All About Birds — Eastern Bluebird Overview
• Cornell Lab / All About Birds — Western Bluebird
• Project FeederWatch — Mealworms
• Project FeederWatch — Feeding Birds

Jonathan Gron

Jonathan Gron is the founder and editor of OwlRatings, where he researches birding, backyard wildlife and practical bird-safety guidance using current primary, government and professional sources.