Introduced to Burundi (B) (NB), Kenya, Rwanda (B).
Virtually endemic to Tanzania southern and east of L Victoria, but including some islands off southern shore; range centred on Serengeti. Feral populations exist in Mombasa, now apparently hybridizing with Yellow-collared Lovebird (Agapornis personatus). Recent records from Burundi and Rwanda appear to refer to wild birds irrupting in response to drought within normal range.
 
Population
Estimated population is 290,000 - 1,002,000 (2010).
Fischer's Lovebird (Agapornis fischeri) [XC206037]
by Rory Nefdt from Rift Valley Resort, Lake Naivasha, Kenya (song)
Fischer's Lovebird (Agapornis fischeri) [XC429937]
by Stanislas Wroza from Ndutu Safari Lodge, Ngorongoro, Arusha Region, Tanzania (call)
Nest
In holes and cracks in dead trees or dead branches on living trees, situated 2-15 m above the ground. Occasionally sometimes in cliffs.
Eggs (Guide)
Clutch Size: 4 - 6
Dimensions: 23 x 17 mm (rounded)
Subspecies
Sometimes treated as conspecific with Yellow-collared Lovebird (Agapornis personatus). Also on occasion with Lilian's Lovebird (Agapornis lilianae) and Black-cheeked Lovebird (Agapornis nigrigenis). Perhaps best considered to form superspecies with all three.