Stable flies (Stomoxys calcitrans) are serious pests of livestock worldwide. Their painful bites agitate livestock, reduce weight gain, and, in extreme cases, can result in mortality. (Photo credit: David Taylor, Ph.D.) Leave a Reply Cancel reply Search Search for... Search Get New Posts in your Inbox! Enter your email address to subscribe to Entomology Today. You'll receive notifications of new posts by email. Email Address Get Certified!