What Can Tarantulas Eat at a Birthday (Molt) Party? The Prey Guide

Tarantulas eat live or pre-killed invertebrate prey. The birthday or molt anniversary feast is appropriately sized prey offered once the tarantula has fully hardened after a molt and is clearly in feeding condition. The prey list is short: crickets, dubia roaches, superworms, mealworms, and hornworms depending on species and size. The timing is more important than the specific prey choice. A tarantula in premolt won’t eat and shouldn’t be offered prey; a tarantula that just molted is vulnerable and needs to harden for days to weeks before any feeding attempt.

The Molt Timing Rule (Most Important)

Never offer prey during premolt. A tarantula approaching a molt stops eating, often seals its hide, and becomes inactive. A tarantula in this state with live prey in the enclosure is at risk of being harmed by the prey item, particularly a cricket that bites a molting spider. If the T is showing premolt signs, remove all prey and wait for the molt to complete.

Wait after the molt. After a molt, the tarantula’s exoskeleton is soft and the fangs are non-functional. Wait until the spider’s coloring has darkened to post-molt appearance and the fangs are clearly hardened before offering any prey. For small species and juveniles, this takes 48 to 72 hours. For large adult females, it may take 2 weeks or more.

The birthday or molt anniversary feast happens after full hardening, not on the molt date itself.

What Tarantulas Can Eat at the Birthday Feast

Crickets. The most widely available feeder for tarantulas. Appropriate sizes range from small crickets for slings and small species to large adult crickets for large adults. Pre-kill if the spider doesn’t strike immediately after introduction. An uncaptured cricket left overnight with a tarantula bites.

Dubia roaches. Better nutritional profile than crickets and no escape or noise issues. Many tarantulas prefer dubias to crickets. For the birthday feast, a quality dubia is a better choice than a cricket where the spider accepts them.

Superworms. Good for medium to large tarantulas as a higher-fat treat component. Birthday context appropriate. Pre-kill by crushing the head before offering to remove any biting risk.

Mealworms. Lower nutritional value than dubias, used as a treat or as a small supplement for smaller species. Fine as part of a birthday spread.

Hornworms (for larger species). Soft-bodied, high moisture, dramatic movement. Many large tarantulas take hornworms readily. One or two for a large adult Brachypelma or Grammostola on the birthday is a treat-level offering.

Waxworms (small amounts). High fat, treat only. One or two for a large adult.

What Tarantulas Cannot Eat

Wild-caught insects. Pesticide risk. Pet store or captive-bred feeders only.

Prey too large for the species. The general guideline: prey no larger than the tarantula’s abdomen. Oversized prey is injury risk, particularly for defensive species.

Human food. Tarantulas are obligate predators. No fruit, vegetables, or processed food of any kind.

Prey with chemical exposure. No insects from chemical-treated gardens or unknown sources.

Pre-Killing vs. Live Prey

The American Tarantula Society’s general guidance is that pre-killed prey eliminates the risk of prey biting a vulnerable tarantula. The technique: crush the prey’s head with forceps before offering. This is particularly recommended for any tarantula that has recently molted, for defensive species, or for any enclosure where a refused prey item might be left overnight.

For healthy tarantulas in active feeding condition, live prey is accepted by most species and triggers the full hunting response. Both approaches are valid.

FAQ

My tarantula hasn’t eaten in weeks before the birthday. Is something wrong?

Long fasting periods are common in tarantulas, particularly in fall and winter and during premolt preparation. Check for premolt signs: abdomen appears darker or has a shiny patch visible (the molting membrane forming), the spider is inactive and has plugged its hide. If premolt signs are present, fasting is expected. If there are no premolt signs and the spider has been fasting for more than 2 to 3 months, check temperature and humidity parameters.

Can I feed my tarantula multiple prey items for the birthday?

Most tarantulas eat one prey item per feeding session. Some will take a second item after finishing the first. Don’t leave multiple live prey items in the enclosure simultaneously. Offer one, wait for the spider to begin feeding or decline, and remove any declined prey. A second item can be offered an hour later if the spider is clearly still in feeding mode.

My tarantula killed the birthday cricket but didn’t eat it. What happened?

Some tarantulas kill prey defensively rather than for feeding. This happens when the spider isn’t actually hungry but was triggered by movement. Remove the dead cricket promptly, a rotting cricket in the enclosure releases fluids that can harm the spider and attract mites. The spider simply wasn’t hungry.

Tarantula Birthday Supplies

Tarantula birthdays: enclosure upgrades and live feeders:

• Cork Bark Hide for Tarantula, new hide as the birthday enclosure upgrade.
• Dubia Roach Feeder Insects, quality feeder roaches as the birthday treat.

Sources

• American Tarantula Society: ATS Home
• Smithsonian’s National Zoo: Tarantula
• ASPCA Animal Poison Control Center: Animal Poison Control

For the full birthday party guide: Tarantula Birthday Party Ideas

For the jumping spider comparison: Jumping Spider Birthday Party Ideas