Getting off topic but here goes
many of the Africans can and do cross breed and produce sexually viable offspring when taken out of their natural environment and placed in (say) aquariums.
It seems quite common to give fish species status just because they look slightly different and cone from the next lake/river.
now look at say the honey bee, there is only one species of honey bee (discounting the Asian ones) yet they come from vastly differing climates/ecosystems/continents and would never have meet if it wasn't for man kind. The bees from differing places look different (colour, wing vein patterns), have differing temperaments, and choose differing sized holes to live in. These different bees have only been subspecies status within Apis mellifera