Mosquito vs Crane Fly: How to Tell Them Apart

Size is the most obvious difference. Look at the insect. Is it huge, like the size of a small fly or larger? It is a crane fly. Is it tiny, just a speck you can barely see? It is a mosquito. Crane flies are about five to eight times longer than mosquitoes. This size difference is dramatic and obvious. Next, look at the legs. Crane flies have extremely long, thin legs that seem to go on forever. Their legs are as long or longer than their entire body. Mosquitoes have shorter legs proportional to their body size. The legs do not stick out as far. Third, check if it bites. If something just bit you, it was definitely a mosquito. Crane flies do not bite under any circumstances. They have no biting parts. If you felt a bite, the question is already answered.

Mosquitoes are tiny insects, about one quarter to three eighths inch long. When a mosquito lands on your skin, you can barely see it. Most people do not notice a mosquito until they feel the bite. Crane flies are large, about one and a half to two inches long. A crane fly is visible from across a room. If you spot one in your house, it is obvious because of its size. Crane flies look gangly and awkward. Their long legs make them appear fragile and spindly. Mosquitoes have a more compact body shape. Their legs are short enough to fit on their narrow body. The body of a mosquito is thin and elongated. The body of a crane fly is also thin but appears stockier because of its larger size. When you see them together in pictures, the size difference is striking. A mosquito looks like a tiny speck compared to a crane fly.

Both mosquitoes and crane flies are found throughout the United States. Mosquitoes are found everywhere there is standing water. You can find mosquitoes in Wisconsin and Wyoming and every state in between. They thrive in ponds, marshes, and even small containers with water. Crane flies live near wet areas including marshes, stream banks, and wet soil. Both insects come out at dusk when it gets cooler. Mosquitoes are particularly active in warm months. Crane flies appear more in spring and fall. You can find both insects indoors when they enter homes and buildings. Mosquitoes seek out people and animals to feed on. Crane flies are just passing through and are attracted to lights. For more information about wildlife in your area, check local resources. Both insects are part of the natural ecosystem.

Mosquitoes are on a mission. They fly straight toward you looking for exposed skin. They land, probe for blood with their long snout, and feed quickly. This process takes only a minute or two. Then they fly away. The bite itches afterward. Crane flies act differently. They seem confused and clumsy. They bump into walls and objects. If one lands on you, it just walks around. It does not bite. It seems lost and disoriented. Crane flies are attracted to lights and often end up in houses and buildings in the evening. Once inside, they fly in circles and look panicked. Mosquitoes come inside looking for a meal. Crane flies come inside by accident. Mosquitoes are aggressive and fast. Crane flies are passive and slow. You can catch a crane fly easily by hand or a tissue. A mosquito is harder to catch because it notices threats and escapes quickly.

Start with size. How big was it? If it was barely visible, very small, like a speck, it was a mosquito. If it was large, noticeable from across a room, several inches if you measure it in your mind, it was a crane fly. Look at the legs. Were the legs extremely long and spindly, sticking out at odd angles? Crane fly. Were the legs short and tucked in? Mosquito. Check what happened next. Did it bite you or cause a bump and itch? Mosquito. Did it just land and walk around looking confused? Crane fly. Think about the season. In warm months with high humidity and standing water, mosquitoes are more likely. In spring and fall near wet ground, crane flies are more common. By the time you consider two of these features, you will know which insect you saw.

The biggest myth about crane flies is that they are giant mosquitoes. They are not related to mosquitoes at all, despite the similar body plan. Crane flies belong to a different family. Another myth is that crane flies bite. They do not bite and have never bitten anyone. Their mouth parts cannot pierce skin. Some people think crane flies are dangerous or toxic. They are not toxic and cause no harm whatsoever. People sometimes call crane flies by other names. Mosquito hawks and daddy longlegs are common nicknames, but these names are incorrect or misleading. The term daddy longlegs usually refers to harvestmen, which are arachnids, not insects at all. Many people fear crane flies because of their size and spindly legs. The fear is unfounded. A crane fly is one of the most harmless insects you can encounter. Understanding wildlife like insects helps reduce unnecessary fear and misunderstanding.