Falcons, hobbies and kestrels are all in the genus Falco. In general terms, the larger birds are falcons; the smaller swift ones possessing long, narrow wings are hobbies and; those that hover while hunting for prey are the kestrels.
Scientific name: Falco
The shading illustrates the diversity of this group - the darker the colour the greater the number of species. Data provided by WWF's Wildfinder.