Table 3 Species, altitudinal range, habitat and available area of occurrence from IUCN estimates

H. burgessi

East Usambara: 900–1100 m

Submontane forest

14,774 km²

Nguru: 900–1000 m

Uluguru: 980 m

H. davenporti

Livingstone: 2010 m

Montane forest edge

28 km²

H. minutissimus

Njombe: 2010 m

Montane forest edge and grassland

14,904 km²

Udzungwa: 1680–1970 m

H. spinigularis

Malawi: 690 m

Submontane forest and forest edge

5,488 km²

Mozambique: 1250 m

H. tanneri

West Usambara: 1310–1650 m

Submontane forest and forest edge

4 km²

H. ukwiva

Rubeho: 1660 m

Montane forest edge

1,179 km²