Complex sentence: The Swaheli Sparrow ("Passer suahelicus ") was until recently treated as a race of Grey-headed Sparrow ("Passer griseus"), it lives in the savanna of southern Kenya and Tanzania.
Split into simpler sentences: The Swaheli Sparrow ("Passer suahelicus ") was until recently treated as a race of Grey-headed Sparrow ("Passer griseus"). It lives in the savanna of southern Kenya and Tanzania.