There is no bird species officially called a "chicken hawk." This is a colloquial term often used to refer to hawks in general, especially those that may prey on chickens.
Hawks are not typically endangered as a whole group. However, some specific hawk species face threats and are considered endangered or vulnerable depending on the region.
To determine where a particular hawk species is endangered, you need to specify the species. For example, you could ask about the Northern Goshawk or hawk species in California.
By specifying the species and location, accurate information about its conservation status can be provided.