email a friend
printable version
Location Kenya, Coast Province
Central coordinates 39o 14.00' East  4o 29.00' South
IBA criteria A1, A2, A3
Area 1,520 ha
Altitude 30 - 160m
Year of IBA assessment 2001


Site description Marenji is a relatively large fragment of coastal forest (covering c.1,480 ha), gazetted as a Forest Reserve in 1967 and located near the Mombasa–Lungalunga road, c.1 km from Mrima trading centre. The forest is undifferentiated, on Magarini sands, with a mixture of grassland and scrubby woodland in the valleys. Farmland and grassland surround it. Rainfall is around 1,100 mm/year. Some of the major tree species include Scorodophloeus fischeri, Newtonia paucijuga, Combretum schumannii, Nesogordonia holtzii, Bombax rhodognapholon, Afzelia quanzensis, Cordyla africana, Julbernardia magnistipulata, Albizia glaberrima var. glabrescens, Milicia excelsa, Diospyros mespiliformis, Manilkara discolor and M. sansibarensis.

Key Biodiversity See Box and Tables 2 and 3 for key species. This forest holds healthy, and probably viable populations of East African coastal forest species, including the globally threatened and restricted-range Anthus sokokensis, the Near Threatened Anthreptes reichenowi and Tauraco fischeri. Regionally threatened species include Erythrocercus holochlorus.

Non-bird biodiversity: There is no information on other fauna. The threatened small mammal Rhynchocyon petersi (EN) probably occurs, as probably does the increasingly uncommon primate Colobus angolensis palliatus. Of 240 plant taxa, at least 12 plant species occurring in Marenji are considered globally or nationally rare.

Populations of IBA trigger species

Species Season Period Population estimate Quality of estimate IBA Criteria IUCN Category
Brown-headed Parrot Poicephalus cryptoxanthus resident  1999  present  A3  Least Concern 
Fischer's Turaco Tauraco fischeri resident  1999  present  A1, A2, A3  Near Threatened 
Mombasa Woodpecker Campethera mombassica resident  1999  present  A3  Least Concern 
Chestnut-fronted Helmet-shrike Prionops scopifrons resident  1999  present  A3  Least Concern 
Green-headed Oriole Oriolus chlorocephalus resident  1999  present  A3  Least Concern 
Yellow Flycatcher Erythrocercus holochlorus resident  1999  present  A3  Least Concern 
Fischer's Greenbul Phyllastrephus fischeri resident  1999  present  A3  Least Concern 
Tiny Greenbul Phyllastrephus debilis resident  1999  present  A3  Least Concern 
Black-bellied Glossy-starling Lamprotornis corruscus resident  1999  present  A3  Least Concern 
Plain-backed Sunbird Anthreptes reichenowi resident  1999  present  A1, A3  Near Threatened 
Sokoke Pipit Anthus sokokensis resident  1999  present  A1, A2, A3  Endangered 
Eastern Green Tinkerbird Pogoniulus simplex resident  1999  present  A3  Least Concern 

IBA Monitoring

2007 not assessed not assessed not assessed

Protected areas

Protected area Designation Area (ha) Relationship with IBA Overlap with IBA (ha)  
Marenji Forest Reserve 1,519 is identical to site 1,519  


IUCN habitat Habitat detail Extent (% of site)
Forest Lowland forest - undifferentiated  -
Shrubland Scrub - woodland  -

Land use

Land-use Extent (% of site)
forestry -
nature conservation and research -

References Mlingwa et al. (2000), Robertson and Luke (1993), Waiyaki (1995), Waiyaki and Bennun (2000).

Contribute  Please click here to help BirdLife conserve the world's birds - your data for this IBA and others are vital for helping protect the environment.

Recommended citation  BirdLife International (2016) Important Bird and Biodiversity Area factsheet: Marenji Forest. Downloaded from on 25/10/2016

To provide new information to update this factsheet or to correct any errors, please email BirdLife