Don't nail your bluebird houses to trees, as this is sure to attract squirrels and raccoons. Wrens will drive off the bluebirds, peck holes in their eggs, and even kill the young. My neighbors and I have seen what we think is a coyote several times in our backyards. The eastern coyote is on the increase all across the northeast, and is well established in Connecticut. It has been widely reported that coyotes attack dogs and cats as well as domestic livestock.
Eastern coyotes eat a diverse number of plants, animals and insects.
From grasshoppers to fallen fruit, winter killed deer, mice, squirrels, and woodchucks, coyotes are opportunists willing to take advantage of nearly any available food source. They are also highly intelligent canines that habituate fairly quickly to people where they are not persecuted. Thus, these animals are not afraid to expose themselves to view and sometimes even seem curious about human affairs. Like all wild animals, it is unwise to approach, feed or try to touch coyotes. You should be aware that coyotes are in your area, but do not be alarmed.