Distribution

Mrs. Moreau's Warbler is endemic to Tanzania, where it occurs from 1,350‒2,430 m elevation, and is known from three mountain ranges:

Uluguru Mountains. Relatively widespread in the Uluguru Nature Forest Reserve; in the northern part at from 1,350‒1,740 m elevation, although primarily above ca. 1,600 m (23 Stuart, S. N., and F. P. Jensen (1985). The avifauna of the Uluguru Mountains, Tanzania. Gerfaut 75:155–197. Close , 24 Svendsen, J. O., and L. A. Hansen (Editors) (1995). Report on the Uluguru Biodiversity Survey 1993. Part A. Royal Society for the Protection of Birds & Tanzania Forestry Research Institute & Centre for Tropical Biodiversity, Sandy, United Kingdom. Close ). In the southern part south of the Bundiki gap, it has been recorded to 2,430 m (24 Svendsen, J. O., and L. A. Hansen (Editors) (1995). Report on the Uluguru Biodiversity Survey 1993. Part A. Royal Society for the Protection of Birds & Tanzania Forestry Research Institute & Centre for Tropical Biodiversity, Sandy, United Kingdom. Close ).

Ukaguru Mountains. Recorded from Mamiwa-Kisara North Forest Reserve at 1,500‒1,900 m (25 Friedmann, H., and K. F. Stager (1964). Results of the 1964 Cheney Tanganyikan Expedition. Los Angeles County Museum, Contributions in Science 84:1–50. Close , 26 Stuart, S. N., and T. A. van der Willigen (1978). Report of the Cambridge Ecological Expedition to Tanzania 1978. Cambridge, United Kingdom. Unpublished report. Close , 27 Evans, T. D., and G. Q. A. Anderson (1993). Results of an ornithological survey in the Ukaguru and East Usambara mountains, Tanzania. Scopus 17:40–47. Close , 5 Bowie, R. C. K., J. Fjeldså, and J. Kiure (2009). Multilocus molecular DNA variation in Winifred’s Warbler Scepomycter winifredae suggests cryptic speciation and the existence of a threatened species in the Rubeho–Ukaguru Mountains of Tanzania. Ibis 151:709–719. Close ), with recent audio recordings and photo documentations (see eBird).

Rubeho Mountains. Found on the eastern edge of Ukwiva Forest Reserve at 1,800‒2,100 m (28 Fjeldså, J., K. M. Howell, and M. Andersen (1997). An ornithological visit to the Rubeho Mountains, Tanzania. Scopus 19:73–82. Close , 5 Bowie, R. C. K., J. Fjeldså, and J. Kiure (2009). Multilocus molecular DNA variation in Winifred’s Warbler Scepomycter winifredae suggests cryptic speciation and the existence of a threatened species in the Rubeho–Ukaguru Mountains of Tanzania. Ibis 151:709–719. Close ).

Mrs. Moreau's Warbler was previously thought to be present in the Udzungwa Mountains, but this was reported in error (29 Jensen, F. P., L. Dinesen, L. A. Hansen, D. C. Moyer, and E. A. Mulungu (2020). Bird species richness in the montane evergreen forests of the Udzungwa Mountains, Tanzania. Scopus 40:39–49. Close , FPJ). Also, an earlier version of this species account (2.0) wrongly stated that it occurs on Salanga Ridge in northern Tanzania (30 Jensen, F. P. (2022). Mrs. Moreau's Warbler (Scepomycter winifredae), version 2.0. In Birds of the World (P. G. Rodewald, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. Close ).

Information needed.