Genus Certhia refers to a group of small, tree-climbing birds that are commonly found in wooded areas across Europe, Asia and North America. These birds are known for their unique behavior of climbing tree trunks headfirst while using their long, curved bills to search for insects and other small prey. Some synonyms for Genus Certhia include treecreepers, certhids, and brown creepers. Treecreepers are named for their ability to climb trees vertically, while certhids and brown creepers are named for their distinctive physical characteristics. Regardless of their name, these birds are an important component of forest ecosystems and are a delight to observe in the wild.