When the Tent Caterpillar nests on the wild cherries became obvious last week, I was sorely tempted to remove them before the voracious larvae began their daily walkabouts in search of fresh foliage. But I was busy and didn't get to the task, and now I'm glad I waited... because someone in the neighborhood is happily doing the pest elimination for me. We've been awash in Blue-gray Gnatcatchers, and while I normally associate these feisty mites with gleaning all sorts of small flies from the air, it turns out that their diet can include far more than just members of the Diptera. BGGs, we discovered, are very fond of small Tent Caterpillars, and now that the little crawlers are leaving the nests, the Gnatcatchers have begun frequent visits to pluck the pests off the silk and the bark. Soon enough, alas, the caterpillars will get too big for the birds to handle, but for now, the BGGs are doing a fine job of keeping the foliage eaters down to more manageable levels. With any luck, the birds will expand their diets to include tiny Gypsy Moths. One can hope.