Black widow spiders are infamous for their venom, glossy black appearance, and the signature red hourglass marking on their abdomen. Beyond their reputation, these spiders also have unique feeding habits that make them fascinating predators. They are opportunistic hunters, consuming a wide variety of insects, arachnids, and even small reptiles when the chance arises. In this article, we’ll dive into the details of what black widows eat, how they catch their prey, and the 12 most common foods they love to consume.
Black Widow Spider Diet Basics
What Does a Black Widow Spider Eat?
Black widow spiders primarily eat insects, but their diet isn’t limited to just small bugs. They capture prey that stumbles into their sticky, irregular webs, ranging from crickets to beetles and even other spiders. Once prey is trapped, the black widow injects venom that paralyzes the victim almost instantly. Instead of chewing, these spiders use digestive enzymes to liquefy the insides of their prey, then suck out the nutrients.
Black Widow Spider Eating Behavior
Unlike active hunters such as wolf spiders, black widows are ambush predators. They wait patiently in their webs until prey makes the fatal mistake of getting caught. They don’t need to eat daily—sometimes a single large insect can sustain them for several days. However, their cannibalistic behavior, especially females consuming males after mating, has made them one of the most talked-about spiders in the world.
12 Common Foods Black Widow Spiders Eat
1. Crickets and Grasshoppers
Crickets are among the most frequent meals for black widow spiders. Their chirping at night often leads them into widow webs, where they quickly become immobilized. Grasshoppers, though larger, can also get tangled in the strong silk threads. Once captured, the spider wraps them tightly and feeds slowly, often over several hours.
2. Flies and Mosquitoes
Flies and mosquitoes are easy targets for black widows, especially since they are attracted to lights near human homes where widow webs are often found. Their small size makes them quick meals, but black widows consume them frequently. These insects provide a steady source of protein and energy.
3. Beetles
Beetles, particularly smaller species, are another staple in the black widow’s diet. Despite their hard exoskeletons, beetles can become helpless once trapped in the sticky web. The spider’s venom and digestive enzymes soften the beetle’s body, allowing the widow to feed efficiently.
4. Ants
Ants are common around homes and gardens, and many end up in black widow webs. Some species may fight back, but the venom of the widow quickly overpowers them. Interestingly, black widows sometimes compete with other spiders for ants, making them both predators and rivals in shared habitats.
5. Moths and Butterflies
As nocturnal hunters, black widows often catch moths that fly into their webs during nighttime hours. The light fluttering of a moth’s wings triggers the spider’s response. Occasionally, smaller butterflies also become prey, though moths are far more common because of their nighttime activity.
6. Other Spiders
Black widows are known for eating other spiders, including those of their own kind. They are highly territorial, and when another spider enters their web, the widow will often attack. Reports also show them consuming cellar spiders and other cobweb-building species. In some rare cases, a daddy long legs (cellar spider) can defeat a widow, but more often, the widow comes out on top.
7. Wolf Spiders and Jumping Spiders
Interactions between black widows and wolf spiders are particularly interesting. Sometimes wolf spiders overpower and eat black widows, but when caught in a widow web, the tables turn. Similarly, jumping spiders—known for their agility—can occasionally prey on young widows, but adult widows can also trap and consume them. These predator-versus-predator encounters highlight the widow’s ability to take on even strong arachnid competitors.
8. Lizards and Small Reptiles
Although black widows mainly prey on insects, there are rare instances of them catching small lizards. When a juvenile reptile wanders into the web, the widow’s silk is strong enough to hold it down. The venom is injected quickly, and the spider feeds in the same way as with insects—by liquefying the tissues. These cases are uncommon but demonstrate just how powerful the black widow’s venom can be.
9. Small Snakes
Even more surprising is the occasional report of black widow spiders killing and consuming small snakes. Though snakes are not typical prey, a hatchling snake can get entangled in the sticky web. Once trapped, the widow delivers repeated venomous bites. The paralysis allows the spider to feed slowly, showcasing their ability to subdue creatures far larger than themselves.
10. Grasshoppers and Locusts
Grasshoppers are clumsy fliers, and locusts often travel in swarms. Both can easily become tangled in a black widow’s irregular web. The spider strikes quickly, injecting venom and wrapping the insect tightly. Because grasshoppers are larger than flies or mosquitoes, a single one can provide nourishment for several days.
11. Cockroaches
Cockroaches are another common prey in urban environments where black widows thrive. They are abundant around garbage areas and dark corners, which also serve as ideal hiding spots for the spiders. A cockroach that wanders into a widow’s web is quickly subdued. This helps reduce cockroach populations naturally, though most homeowners would still rather not encounter either insect indoors.
12. Male Black Widow Spiders
Perhaps the most infamous meal of all is the male widow. After mating, the female sometimes consumes her partner. This behavior, often referred to as sexual cannibalism, is not guaranteed but is common enough to be part of their reputation. The nutrients gained from eating the male may help the female produce stronger eggs. Evolutionary biologists suggest this cannibalism may increase reproductive success, though it is still debated whether males willingly sacrifice themselves or simply fall victim to the female’s hunger.
Do Black Widows Eat Humans or Can Humans Eat Them?
What Happens If You Eat a Black Widow Spider?
Humans are not prey for black widows, but an unusual question often arises: what if a person ate one? Ingesting a black widow spider is highly unsafe because its venom remains toxic. While stomach acid may neutralize some effects, there is still a risk of poisoning. It is strongly advised never to attempt this.
Can You Eat a Black Widow Spider?
Unlike edible tarantulas found in some cultures, black widow spiders are not considered safe to eat. Their venom is dangerous, and the spider’s reputation alone should be enough to discourage any experimentation.
Predators – What Eats a Black Widow Spider?
Despite their venom and deadly reputation, black widows do have natural predators. Birds, especially larger insect-eating species, often feed on them. Mud dauber wasps are among the most notable enemies—these wasps paralyze black widows and carry them to their nests as food for their larvae. Other spiders, such as cellar spiders or daddy long legs, have been documented defeating widows in web-to-web battles. Even some reptiles occasionally snack on them. This balance in nature keeps black widow populations under control.
Final Thoughts
Black widow spiders are skilled hunters that eat a wide variety of prey. Their diet includes everything from small insects like flies and crickets to larger animals such as lizards and snakes. The most sensational aspect of their feeding behavior remains the female’s tendency to eat her mate, a fact that has fueled myths and legends for centuries. While humans should avoid close encounters with these venomous spiders, it is fascinating to study how they survive and what role they play in controlling insect populations.
FAQs
Do black widow spiders eat their mates?
Yes, female black widows sometimes consume the male after mating. This behavior is called sexual cannibalism and may provide the female with extra nutrients to produce eggs.
Can black widow spiders eat snakes or lizards?
Although rare, they can. If a small reptile or baby snake gets stuck in their strong web, the widow’s venom is powerful enough to paralyze and kill it.
What is the black widow spider’s favorite food?
Crickets, flies, and beetles are considered the most common foods in their diet. These insects are abundant and easy to capture in webs.
Do black widows eat other spiders?
Yes, black widows are highly territorial and will attack and eat other spiders, including jumping spiders, wolf spiders, and even other widow species.
What eats a black widow spider?
Predators include birds, mud dauber wasps, and cellar spiders (daddy long legs). Despite their dangerous venom, black widows are not invincible in the food chain.
