Why Are There Dragonflies Swarming In My BackYard?

Question by Lacy Fasky: Why Are There Dragonflies Swarming In My BackYard?
I look outside my window and there is about 100 or so dragonflies flying by my window and my whole backyard. and these suckers are huge ha. But they aren’t anywhere else except my backyard??? why? can someone please tell me why these insects are swarming?? oh and it rained about two days ago??

Best answer:

Answer by Diane
Dragonflies are attracted to water sources. Perhaps you have containers, pots, or even lawn furniture that trapped some of the rain water. The late summer is also a time when many insects breed and lay winter-hardy eggs, and that may account for a heavier-than average dragonfly swarm.

But, they don’t hurt anything and their iridescent wings are lovely! I’m envious of your swarm.

What do you think? Answer below!

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6 Responses to “Why Are There Dragonflies Swarming In My BackYard?”

  1. hill bill y on May 10th, 2011 8:27 am


  2. SK Wildflower Rescue on May 10th, 2011 8:28 am

    You have a water source nearby where they came from and now they are hunting. You may also have a hatch of mosquitoes, gnats, mayflies, something that they are finding in your yard. They fly back and forth grabbing insects out of the air.

    They are good for any yard, soon their numbers will decrease and they will move on.

  3. Aaron M on May 10th, 2011 8:54 am

    Dragonflies are pretty territorial so they have picked your back yard as a place to gather. They are either there for mating – which isn’t likely b/c the females need a water source to lay their eggs, or they were there for food. The rain may have brought smaller bugs up from the ground and the dragonflies have found a ready meal. I’ve heard they often travel in swarms, too.
    Pretty cool to see a swarm like that!

  4. mkimble65 on May 10th, 2011 9:32 am

    You said it had just rained. Dragonflies lay eggs near water, their eggs hatch and become water-born nypmphs whgich actually live in water. What they eat at that stage in their lives is mosquito larvae, and small aquatic plants and animals. They are voracious eaters too. Once they reach adequate size and maturity, they continue to develop and become adut dragonflies and emerge from the water. At that point they have beautifully developed wings and can fly very well. The reason that they are everywhere in your backyard is likely due to one reason – the water. The water provides breeding grouns, food, and life. What do the adult dragonflies eat? Flying insects in and around water – namely adult, flying mosquitos. Since the rian just came, you had a huge batch of dragonflies emerge, and mosquitos as well. The dragonflies are clearing your yard of mosquitos. Pretty cool, and cheaper than bug spray.

  5. Henry H on May 10th, 2011 9:56 am

    You have some good answer so I just wanted to say you are lucky and thanks for that information

  6. Ishtar on May 10th, 2011 10:09 am

    You’ve probably got some standing water from the rain, which is now attracting mosquitoes and other insects. The dragonflies are eating the insects. Cheer them on.

    Dragonflies are good luck!

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