If the bluebirds had her courage and hot, quick temper, they would never let the sparrows drive them away from their boxes. Unfortunately a hole large enough to admit a {37} bluebird will easily admit those grasping monopolists; but Jenny Wren is safe, if she did but know it, in her house with its tiny front door. It is amusing to see a sparrow try to work his shoulders through the small hole of an empty wren house, pushing and kicking madly, but all in vain. What rent do the wrens pay for their little houses? No man is clever enough to estimate the vast numbers of insects on your place that they destroy. They eat nothing else, which is the chief reason why they are so lively and excitable. Unable to soar after flying insects because of their short, round wings, they keep, as a rule, rather close to the ground which their finely barred brown feathers so closely match. Whether hunting for grubs in the wood-pile, scrambling over the brush heap after spiders, searching among the trees to provide a dinner for their large families, or creeping, like little feathered mice, in queer nooks and crannies among the outbuildings on the farm, they are always busy in your interest which is also theirs. It certainly pays, in every sense, to encourage wrens. THE CAROLINA WREN The house wrens have a tiny cousin, a mite of a bird, called the winter wren, that is so shy {38} and retiring you will probably never become well acquainted with it. It delights in mossy, rocky woods near running water. But a larger chestnut brown cousin, the Carolina wren, with a prominent white eyebrow, a bird which is quite common in the Middle and Southern States, sometimes nests in outbuildings and in all sorts of places about the farm. However, he too really prefers the forest undergrowths near water, fallen logs, half decayed stumps, and mossy rocks where insects lurk but cannot hide from his sharp, peering eyes. Now here, now there, appearing and disappearing, never at rest, even his expressive tail being in constant motion, he seems more nervously active than Jenny Wren's fidgety husband.