Usambara Mts of north-eastern Tanzania; recently discovered in Uluguru Mts; also possible sighting in Nguru Mts.
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is 2,500 - 9,999 (2010) and decreasing.
Status NR
Habitat destruction and degradation through conversion to agriculture is the main threat.
For more information see BirdLife International Species Factsheet.
Voice
A series of low 'pop pop pop' notes, rising and falling in crescendo and speed.
Usambara Eagle-Owl (Bubo vosseleri) [XC436601]
by Rolf A. de By from Korogwe, Tanga Region, Tanzania (call)
Usambara Eagle-Owl (Bubo vosseleri) [XC509943]
by isaac kilusu from Amani nature reserve, Tanga, Tanzania (song)
Subspecies
Fraser's Eagle-Owl (Bubo poensis) and Nduk Eagle-Owl (Bubo vosseleri) (Sibley and Monroe 1990, 1993) are retained as separate species contra Dowsett and Forbes-Watson (1993) who include vosseleri as a subspecies of Fraser's Eagle-Owl (Bubo poensis).
Similar Species
Spotted Eagle-Owl (Bubo africanus) which is smaller, with white spotting on wing-coverts, white mantle-edging, and yellow eyes.
References
See References.