Critterature: The Dread Letter U

If you've been keeping up, Those who've read me will see I've been writing 'bout animals Alphabetically. They've all behaved well, Made their entrance on cue, 'til at last I arrived at the dread letter "U". Letter "U" proved a challenge I couldn't defeat, After trying and trying, I admit that I'm beat. The names that I found seemed a bit too absurd, Like uakari, urutu, and umbrella bird. Instead, I'll endeavor now to employ A device that I hope everyone will enjoy. Not literary art in any high sense, But a pretty good example of literary license. My "U" category has villains like these: Midges, mosquitoes, ticks, flies, and fleas, Then spiders, and dust mites, and gnats, if you please. I'll stop naming them here for the list would be endless. It's no mystery to me why these bugs are so friendless. It's poor social skills that make them iniquitous, But lucky for me…'cause they're also U-biquitous.