Do Spiders Need Heat?

If you’ve ever wondered, “Do spiders need heat?” or “Is my house hot enough for spiders?” you’re not alone. In fact, there are tens of thousands of different species of spiders, and there is no one-size-fits-all answer. But there are a few common traits that spiders exhibit when it comes to temperature.

First, many cold-blooded animals have evolved the ability to change their body temperature to deal with extremes. For example, some spiders will hunker down and hibernate through the winter. Others will stay active and continue hunting. Some even build shelter or pods in chimneys or downspouts.

In fact, the majority of temperate-zone spiders have antifreeze in their bodies. When temperatures drop, they produce glycol, which prevents blood cells from freezing. This compound also helps lower the freezing point of the spider’s blood, which is a key factor in its ability to survive the cold.

In the spring, female spiders will build a web to keep their body temperature within a range that is suitable for reproduction. When temperatures warm, spiders will move toward the east.

Some species of jumping spiders are ectothermic. This means that they can switch their body temperature depending on their surroundings. They may bask in the sun if it’s too cold, or stay under a rock if it’s too hot.

Some species of tarantulas are ectothermic as well. They do not require direct heat and are usually comfortable at human temperatures. However, they will eat if they’re hungry.

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