<human>:  How can I reduce the number of mosquitos in my backyard naturally?
<bot>: One way to reduce the number of mosquitos in your backyard naturally is to reduce the amount of standing water around your yard. Mosquitoes can lay their eggs in just a few inches of water, so you should regularly empty any items that can hold water (such as buckets, flowerpots, birdbaths, etc), and keep any water-filled containers covered. You can also add plants that naturally discourage mosquitos to your yard, such as citronella or marigolds. Another effective natural option is to use bat houses to encourage bats to live around your home as they are great predators of mosquitos.