“A new study showed that ‘Atlas Long-legged Buzzard’ is composed of individuals with admixed genomes of Long-legged Buzzard (rufinus) and Common Buzzard (buteo + vulpinus), but with closer relationship with the latter. The study thus suggested that cirtensis should be treated as a subspecies of Common Buzzard”.
Details: Atlas Long-legged Buzzard is actually a Common Buzzard.
North African Birds 