Spiders are arachnids that eat by turning prey into liquid food and then drinking it. They do not chew like people do.
Spiders catch prey, inject venom or digestive fluids, and pull the softened meal inside.
Some spiders mainly eat insects, while others also take other spiders or, in rare cases, even plant-based food.
How Spiders Turn Prey Into Food
Spiders do not eat by biting off chunks. They break prey down outside the body, then drink the liquid meal through mouthparts near the front of the body.
Venom, digestive fluids, and the way the cephalothorax and abdomen work together all play a role in this process.
Why Spiders Cannot Chew Solid Food
Spiders do not have jaws made for chewing. Their mouthparts grip prey, pierce it, and move liquid food inward, so they must soften the meal first.
How Fangs, Spider Venom, And Digestive Fluids Work
Spiders inject venom with their fangs to stop the prey. Digestive fluids begin breaking down soft tissue.
This external digestion turns the inside of the prey into a soup-like mixture that the spider can drink.
The Role Of The Cephalothorax And Abdomen In Feeding
The cephalothorax holds the eyes, fangs, and mouthparts that handle prey. The abdomen helps store energy and supports the digestive system.
What Prey Ends Up On The Menu
Most spiders eat animal prey, especially small insects. What spiders eat changes with body size, habitat, and the species, so the menu can range from tiny flies to much larger animals.
Common Insects Like Flies, Mosquitoes, And Moths
Web-building spiders often trap flying insects like flies, mosquitoes, and moths. These are common meals because they move through webs and are easy for a waiting spider to catch.
Ground Prey Such As Beetles, Crickets, And Grasshoppers
Many hunting spiders eat beetles, crickets, and grasshoppers. These prey animals live on the ground or low plants, where active spiders can stalk, chase, or ambush them.
When Larger Spiders Catch Lizards Or Frogs
Some larger spiders, including a tarantula in some cases, may catch small lizards or frogs. A few spider species are strong enough to overpower prey that is much bigger than the insects most people picture.
Why Some Spiders Eat Other Spiders
Spiders eat other spiders when food is scarce or when a larger spider catches a smaller one. Some species even specialize in spider prey.
How Hunting Style Changes The Meal
How a spider hunts shapes what it eats and how it catches it. Web use, stalking, ambush, and water hunting all lead to different prey choices.
Web-Building Spiders And Flying Insects
Web-building spiders often catch flying insects that get tangled in silk. The web acts like a trap, so the spider waits for vibrations before moving in for the meal.
Hunting Spiders That Stalk, Pounce, Or Ambush
Hunting spiders do not rely on webs. They may stalk prey, pounce quickly, or sit still until the right moment, which works well for catching creatures on the ground or on plants.
How Jumping Spiders, Wolf Spiders, And Fishing Spiders Feed
Jumping spiders use sharp vision and quick leaps to grab prey. Wolf spiders chase prey on the ground.
Fishing spiders catch food on or near water, and a huntsman spider often uses speed and ambush to overpower insects.
Unusual Feeding Habits And Meal Timing
Most spiders stick to animal prey, yet a few species have unusual food choices. Meal timing changes with prey supply, age, weather, and body size.
The Plant-Eating Exception Of Bagheera kiplingi
One rare exception is Bagheera kiplingi, a jumping spider that feeds mainly on plant material. It gets much of its food from ant-acacia plants.
Beltian Bodies, Nectar, And Rare Non-Prey Foods
Bagheera kiplingi eats Beltian bodies, which are protein-rich plant structures, and may also take some nectar. Plant food is rare in a spider diet, so this behavior stands out.
How Often Do Spiders Eat And What About Spiderlings
When prey is easy to find, many spiders eat whenever they catch it.
Some spiders can go days or weeks between meals.
Spiderlings often need to feed more often because they are small and growing fast.
