What to Feed Your Ants: A Complete Feeding Guide for US Ant Keepers

Feeding your ants well is one of the most important things you can do as a keeper. Get it right and your colony grows steadily. Get it wrong and you'll see slow development, dead brood, or a queen that stops laying. This guide covers everything you need to know, from the basics of what ants actually need, to how much to offer at different colony sizes, to the mistakes that trip up beginners and experienced keepers alike.

What Ants Actually Need

Ants need two main categories of food: protein and carbohydrates. Protein fuels brood development: eggs, larvae, and pupae all depend on it. Carbohydrates (sugars) power the adult workers who do the foraging, nest building, and day-to-day running of the colony. Both are essential. Neglecting either one will limit your colony's growth.

Water is the third piece of the puzzle. Most ants get some moisture from their food, but a reliable water source in the nest is critical, especially for smaller colonies in test tube setups.

Protein Sources

Protein is what drives brood production. Without a steady supply, queens reduce or stop laying, and larvae develop slowly or die. Here are the best options for US keepers.

Live insects

Live prey triggers the strongest feeding response in most species. Crickets, mealworms, waxworms, and roaches are all good choices. You can buy feeder insects at most pet stores or order them online. Always gut-load your feeders before offering them. This means feeding the insects nutritious food for 24–48 hours so your ants get more out of them. Remove any uneaten live prey within a day or two to prevent stress in the nest.

For small founding colonies (just a queen and a handful of workers), use small prey like fruit fly larvae or micro crickets. A full-size cricket can injure or kill workers in a tiny colony.

Frozen or pre-killed insects

Frozen mealworms, crickets, and roaches are easy, convenient, and widely available at US pet chains like PetSmart and Petco. Thaw them to room temperature before offering. Pre-killed prey works well for most species and removes the risk of injury from live prey.

Fruit flies (Drosophila)

Flightless fruit flies are a staple for small colonies and newly founded queens. They're easy to culture at home and appropriately sized for small workers. A fruit fly culture costs almost nothing to maintain and gives you a steady supply. If you want a detailed walkthrough, check out the Camponotus pennsylvanicus care guide for feeding tips specific to large-colony species.

Mealworms and superworms

Mealworms are one of the most practical protein sources for medium and large colonies. They're available at almost every pet store in the US, they keep well in the fridge for weeks, and ants take them readily. Superworms are larger and better suited to bigger colonies. Cut or crush them before offering if your workers are small, which makes it easier for them to feed.

Other protein options

Some keepers also use small pieces of cooked chicken breast, hard-boiled egg white, or commercial ant protein gel. These can work, but fresh insect prey is generally more nutritious. If you use cooked food, offer small amounts and remove anything uneaten within 24 hours to prevent mold.

Sugars and Carbohydrates

Adult workers run almost entirely on sugar. In the wild, they collect honeydew from aphids, nectar from flowers, and the sweet secretions of caterpillars and other insects. In captivity, you need to replicate this.

Sugar water

A simple sugar water solution (roughly 1 part white sugar to 3–5 parts water) is the standard go-to. You can offer it in a bottle cap, a small cotton ball soaked with solution, or a liquid feeder. Change it every 2–3 days to prevent fermentation and mold. You can also add a tiny pinch of salt to approximate the mineral content of natural honeydew. It is not essential, but some keepers swear by it.

Honey

Diluted honey works well and ants tend to love it. Use raw or plain honey, not artificial honey products. Dilute it with water before offering, because undiluted honey can trap and drown small workers. A ratio of about 1 part honey to 2–3 parts water is a safe starting point.

Fruit

Small pieces of fresh fruit (apple, grape, watermelon, melon) are a good natural sugar source. Ants enjoy the juice and the sugars. Remove fruit after 24–48 hours before it molds. Avoid citrus, which most ants dislike, and anything with artificial sweeteners or preservatives.

Commercial ant food products

There are several commercial ant nectar and sugar gel products on the market. These are fine and convenient, especially for travel or when you forget to make up a fresh solution. Just make sure the product doesn't contain harmful additives. Our own Vanilla Flavoured Sugar Water and Ant Jelly are two ready-to-use options.

Water

Most nest setups (ytong, plaster, or acrylic) have a water reservoir that keeps humidity in the nest at the right level. But many keepers also offer a standing water source in the outworld, especially during summer months when evaporation is faster. A small bottle cap with a piece of cotton wool works well and prevents workers from drowning. Change it every few days.

Founding queens in test tubes get their moisture from the cotton plug at the water end of the tube, so you generally don't need to supplement this until the colony moves into a proper nest.

How Often to Feed

Feeding frequency depends on colony size. Here's a practical breakdown:

Founding queen (0–10 workers)

Very little food is needed at this stage. A small drop of sugar water every 5–7 days is enough. Some keepers offer a tiny piece of prey every week or two. Over-feeding a tiny founding colony causes more problems than it solves, because uneaten food rots and can kill the queen.

Small colony (10–50 workers)

Offer protein once or twice a week, one small insect or a piece of mealworm at a time. Refresh sugar water every 2–3 days. At this size you're starting to see real brood development, so consistent protein matters.

Medium colony (50–300 workers)

Protein 2–3 times a week. Offer appropriately sized prey, such as a medium cricket, a few mealworms, or a small roach. Keep sugar water available at all times and refresh it regularly. This is the growth phase where feeding consistency pays off most.

Large colony (300+ workers)

Large colonies need protein regularly, every 1–2 days for very active species. You'll be going through a lot of feeders. Many keepers at this stage maintain their own feeder insect colonies to keep costs down. Sugar water should always be available, and you may want a larger feeder vessel.

Colony-Size Considerations

Matching prey size to colony size is something new keepers often overlook. A large cricket in a 20-worker colony isn't a feast. It's a hazard. Workers can be injured trying to subdue it, and if they can't kill it quickly, the stress can disrupt the queen's laying. Cut or pre-kill larger prey for small colonies. As your colony grows, you can start offering whole prey and let them handle it themselves.

Also consider the species. Pogonomyrmex barbatus (Red Harvester Ants) are primarily seed-eaters and need a very different diet from most species: they want grass seeds, grains, and some protein on the side. Tetramorium caespitum (Pavement Ants) are generalist omnivores and will take almost anything. Always research your specific species' natural diet.

Common Feeding Mistakes

Overfeeding

This is probably the most common mistake. Leftover food rots, grows mold, and introduces pathogens into the nest. Small colonies especially can be overwhelmed by too much uneaten food. A good rule: offer less than you think they need, check after 24–48 hours, and remove anything untouched.

Only offering protein or only offering sugar

Both are required. A colony fed only protein will have hyperactive workers but poor long-term development. A colony fed only sugar will have lethargic workers and stunted brood growth. Balance is key.

Using the wrong prey size

As covered above, prey that's too large for the colony can injure workers and stress the queen. When in doubt, go smaller or pre-kill and cut the prey into pieces.

Feeding wild-caught insects without precautions

Wild insects can carry parasites, pesticides, and pathogens. If you collect your own feeders from outside, do it away from treated lawns and agricultural land. Freezing wild-caught insects for 48 hours before feeding kills most parasites. This is especially important in the US where pesticide use on lawns is widespread.

Offering food directly in the nest

Always feed in the outworld (the foraging area), not inside the nest itself. Food debris in the nest promotes mold and can harm brood. If your ants aren't taking food out to the foraging area yet, place the food near the nest entrance and let them come to it.

Ignoring seasonal cues

Many US ant species slow down significantly in late fall and winter. Species like Prenolepis imparis (Winter Ants) are actually most active in cold months. During hibernation periods, most temperate species need little to no food. Trying to force-feed a colony in diapause stresses them unnecessarily. Read up on whether your species hibernates and adjust accordingly.

Quick Reference

Feeding your ants doesn't have to be complicated. Keep protein and sugar both available, match prey size to colony size, remove uneaten food promptly, and pay attention to your colony's behavior. A colony that's being fed well is active, growing, and producing brood consistently. That's the goal.