As you reward feathered friends with food and water in your backyard, you get to enjoy connecting with nature as they sing their melodic songs. Although birdwatching is a fascinating hobby, though, not all birds are welcome visitors. While some birds only swoop by to grab a snack, several common species can wreak havoc outside your home. A few are backyard bullies, known for stealing nests or attacking smaller songbirds. Others may destroy your yard, relentlessly make noise, or even attack humans and pets walking outside.