Tarantula Diet

Tarantulas are obligate carnivores that require prey animals to meet their nutritional needs, making proper feeding one of the most important aspects of their captive care. Unlike herbivorous invertebrates where you can simply provide plant material, tarantula keepers must source, maintain, and offer live prey items that stimulate natural hunting behaviors while delivering complete nutrition. Understanding what to feed, how often, and in what quantities allows keepers to support healthy growth, successful molts, and long lifespans in these fascinating arachnids that may live for decades under proper care.

The tarantula diet in captivity consists primarily of commercially raised feeder insects, with crickets, roaches, and mealworms forming the foundation of most feeding programs. Wild tarantulas consume whatever prey they can overpower, including insects, other arachnids, small vertebrates, and various invertebrates that wander within striking distance of their burrows or webs. Captive diets need not replicate this diversity exactly, but providing some variety improves nutritional completeness and keeps feeding interesting for both keeper and spider.

Feeding frequency varies dramatically based on tarantula size, species, and life stage, ranging from multiple meals weekly for growing spiderlings to monthly or less frequent feedings for well-established adults. This variation confuses new keepers who expect rigid schedules like those used for dogs or cats, but tarantulas simply do not operate on predictable feeding calendars. Learning to read your individual animal's condition and appetite provides better guidance than any general schedule could offer for these highly variable animals.

Common questions about tarantula feeding include how large prey items should be, whether to remove uneaten food, how to tell if a tarantula is hungry, and what to do when tarantulas refuse meals repeatedly. These concerns become straightforward once you understand tarantula biology and feeding behavior. The answers generally involve careful observation, patience, and willingness to adjust your approach based on what your individual spider tells you through its behavior and body condition.

This article covers practical feeding guidance for tarantulas of all sizes and species, from choosing and preparing prey items to establishing feeding routines that support optimal health throughout your tarantula's potentially decades-long lifespan in your care.

Crickets remain the most commonly fed prey item for tarantulas due to their widespread availability, appropriate size range, and active movement that triggers strong feeding responses in most species. House crickets and banded crickets work equally well for most tarantulas, with size selection based on your spider's body length. A prey item roughly the size of the tarantula's abdomen provides an appropriate meal that the spider can subdue and consume safely without struggling against resistant prey.

Dubia roaches have largely replaced crickets as the preferred feeder for experienced keepers, offering superior nutrition, easier maintenance, and quieter operation than cricket colonies. Roaches move less erratically than crickets, which some tarantulas prefer while others find less stimulating as prey. The slower movement and inability to climb smooth surfaces makes dubias easier to contain and prevents escapes that crickets accomplish regularly in most keeping setups. Nutritionally, dubia roaches provide excellent protein with moderate fat content that supports healthy growth.

Mealworms and superworms serve as useful supplemental feeders, particularly for tarantulas that show reluctance toward crickets or roaches. The softer bodies and different movement patterns may appeal to picky eaters who refuse other prey types. However, these larvae contain higher fat content than roaches or crickets, making them better as occasional treats than primary staples in a balanced diet. Superworms also pose bite risks if left unattended with vulnerable tarantulas, requiring removal of uneaten prey to prevent injury.

Gut-loading prey before feeding significantly improves the nutritional value transferred to your tarantula with minimal extra effort. Feed crickets and roaches nutrient-rich vegetables, fruits, and commercial gut-load formulas for at least twenty-four hours before offering them as prey. This process fills the prey's digestive system with vitamins, minerals, and other nutrients that your tarantula absorbs when it consumes the meal completely. Keepers who skip gut-loading provide substantially less nutrition despite feeding the same number of prey items over time.

Prey size selection requires matching food items to your tarantula's current size rather than its potential adult size. Spiderlings need pinhead crickets or small roach nymphs that they can overpower without risk of injury. Juveniles graduate to larger prey as they grow through successive molts. Adults can take prey up to roughly their own body length, though most keepers offer moderately sized items that pose no challenge to a healthy spider. Oversized prey may injure tarantulas during prolonged struggles or simply be refused entirely.

Feeding frequency depends on the tarantula's life stage, species characteristics, and current body condition. Hungry spiderlings may eat every few days to support the rapid growth they undergo between frequent molts. Juveniles typically eat once or twice weekly as their growth rate moderates. Adults of slow-growing species may only need feeding every two to four weeks, while faster-metabolizing species eat more frequently. Observing abdomen size provides the best guidance, with plump abdomens indicating adequate nutrition and shrunken ones suggesting the spider needs food.

New World terrestrial species like Brachypelma and Grammostola represent the most commonly kept tarantulas and accept standard feeder insects without difficulty. These species typically have moderate appetites, eating regularly when hungry but going off food for extended periods before molts or during cooler seasons. Their relatively docile natures make feeding straightforward, as they rarely display defensive behavior during prey presentation that might intimidate new keepers unfamiliar with tarantula body language.

Old World terrestrial species including Pterinochilus and Hysterocrates tend toward more aggressive feeding responses and faster metabolisms than their New World counterparts. These tarantulas often strike at prey immediately upon detection and may benefit from slightly more frequent feeding opportunities when growing actively. Their defensive dispositions require more cautious feeding approaches, using long tongs to place prey rather than dropping items directly from your hand where defensive strikes could contact skin.

Arboreal species present unique feeding challenges since they occupy vertical space and may not detect prey placed on the enclosure floor below their elevated retreats. Offering food directly via tongs at the web entrance or cork bark hide works better than trusting the spider to descend and hunt. Some arboreal species also prefer flying prey like moths that they would encounter naturally, though most accept roaches and crickets readily once they learn to take them from keepers.

Dwarf species and small tarantulas require appropriately tiny prey that can be difficult to source commercially in sufficient quantities. Fruit flies, pinhead crickets, and small roach nymphs serve these miniature predators adequately. Maintaining cultures of appropriate prey ensures continuous access since pet stores rarely stock feeders small enough for the smallest species. The higher metabolism of small-bodied species often means more frequent feeding than larger tarantulas require.

Large species including Theraphosa and Lasiodora can consume substantial prey items and may benefit from occasional vertebrate prey like pinky mice for dietary variety. However, most keepers find that large roaches and crickets provide adequate nutrition without the additional complexity of vertebrate feeders. These impressive species may eat less frequently than their size suggests, going weeks between meals when well-established adults.

Establishing a feeding routine helps ensure consistent nutrition while making observation easier for tracking health over time. Choose a regular feeding day each week to check on your tarantulas and offer food to those showing signs of appetite. This consistency allows you to track appetite patterns and notice changes that might indicate premolt, illness, or environmental problems. Recording feeding dates and prey items consumed provides useful reference for understanding each individual's normal behavior.

Prey presentation affects feeding success, particularly with shy or nervous tarantulas that may be easily startled. Some spiders respond best to prey placed quietly near their hide entrance where they will encounter it naturally. Others prefer the stimulation of prey dropped from above that triggers immediate hunting responses. Learning your individual tarantula's preferences improves feeding success and reduces stress during the process for both you and the spider.

Remove uneaten prey within a few hours of offering, since crickets and roaches left overnight may stress, injure, or even kill molting tarantulas. Prey items that wander into burrows or hide spaces can ambush vulnerable spiders during the delicate molting process when the tarantula cannot defend itself. This risk applies especially to larger prey like superworms that possess strong mandibles capable of inflicting real damage. A brief extra effort to retrieve uneaten food prevents potentially fatal consequences.

Recognizing hunger signs helps determine when to offer food rather than following arbitrary schedules that may not match your spider's needs. Hungry tarantulas often adopt hunting postures near hide entrances, react quickly to vibrations suggesting prey presence, and may emerge more frequently during typical feeding times. Full tarantulas ignore prey, move lethargically, or retreat deeper into hides when food is offered. Learning to read these signals allows feeding that responds to actual need.

Water provision complements feeding by ensuring tarantulas can maintain proper hydration between meals. Provide a shallow water dish appropriate to your tarantula's size, keeping it clean and filled with fresh water. Many tarantulas drink regularly, especially after eating or during dry periods when humidity drops. Misting enclosure walls provides additional drinking opportunities for species that lap water from surfaces rather than drinking from open dishes.

Overfeeding represents the most common nutritional mistake tarantula keepers make, particularly with species prone to fast growth and large appetites. While most tarantulas self-regulate and refuse food when full, some will continue eating until their abdomens become dangerously distended and vulnerable to rupture. Power feeding to accelerate growth stresses the animal and may shorten lifespan significantly compared to tarantulas fed more moderately. Tarantulas benefit from measured feeding that supports steady growth rather than maximum caloric intake at every opportunity.

Using prey that is too large risks injury to tarantulas that struggle to subdue their meal effectively. A cricket that fights back can damage eyes, book lungs, or the soft abdomen during prolonged encounters where the tarantula cannot quickly dispatch its prey. Conservative prey sizing ensures your tarantula maintains complete control throughout the feeding process. Offering two smaller prey items provides the same nutrition as one large item without associated risks of prey fighting back effectively against your spider.

Leaving uneaten prey in enclosures overnight endangers tarantulas, especially during the vulnerable premolt and molt periods when spiders cannot defend themselves against even small threats. Cricket bites and roach chewing have killed countless tarantulas whose keepers assumed the prey posed no threat to a much larger spider. Always remove uneaten prey within hours of offering, and never feed tarantulas showing premolt signs like darkened carapaces, webbed-over burrow entrances, or refused recent meals.

Neglecting gut-loading wastes the nutritional potential of each feeding session that you work to provide. Prey raised on minimal nutrition and offered immediately after purchase provides far less benefit than gut-loaded insects stuffed with vegetables and supplements for twenty-four hours or more. The extra day of preparation transforms adequate feeders into genuinely nutritious meals. Making gut-loading a standard part of your feeding routine requires minimal effort but delivers significant improvements in your tarantula's long-term health and vitality.

Ignoring individual appetite variation leads to inappropriate feeding attempts that stress reluctant eaters unnecessarily. Tarantulas refuse food for various reasons including impending molt, recent molt recovery, breeding condition, seasonal cycles, temperature drops, and simple satiation. Repeatedly offering food to an uninterested spider accomplishes nothing positive and may stress the animal. Accept refusals gracefully, remove the prey, and try again in a week or two rather than forcing daily confrontations with unwanted food.

Tarantula feeding success depends on matching prey type and size to your individual spider while maintaining the flexibility to adjust based on observed behavior rather than rigid schedules. Crickets, roaches, and mealworms provide the foundation of captive tarantula diets, with gut-loading transforming these common feeders into genuinely nutritious meals that support long-term health. The effort required to gut-load prey and remove uneaten items pays dividends through healthier animals and trouble-free molts throughout your spider's life.

Feeding frequency should respond to your tarantula's actual condition rather than arbitrary calendar intervals that may not match its metabolic needs. Growing spiderlings need frequent meals to support rapid development between molts, while established adults may eat monthly or even less frequently during certain seasons. Observing abdomen size, hunting behavior, and appetite provides better guidance than any general recommendation could offer. Learning to read your individual tarantula's signals makes feeding decisions straightforward once you develop the skill.

Safety considerations matter throughout the feeding process, from sizing prey appropriately to removing uneaten food promptly after feeding sessions. The few extra minutes required to ensure prey cannot harm your tarantula prevents injuries and deaths that careless keepers experience when convenience overrides caution. Every feeding session should end with confirmation that no prey remains loose in the enclosure where it could harm a vulnerable spider.

Patience serves tarantula keepers well, since these animals operate on timescales that may frustrate those expecting instant gratification or predictable feeding responses. Tarantulas fast for extended periods before molts, during seasonal cycles, and seemingly at random for reasons keepers cannot always identify. Respecting these patterns rather than fighting them reduces stress for both keeper and spider while supporting the natural rhythms that define tarantula life. Your spider's willingness to eat or refuse food communicates something about its current state that you should observe and respect rather than override with persistent feeding attempts.