Delta Mahakam

Site description (2003 baseline):

Site location and context
The area is also known as Samarinda Beach. It is a dynamic delta area with mangrove and nypah swamp behind tidal mudflats.

Key biodiversity
Based on 1987 survey, there is no high number of waterbirds (highest number 2263, with 1 roosting group of 1410 birds). There are some important species such as Chinese Egret Egretta eulophotes and Lesser Adjutant Leptoptilus javanicus (29 birds). The first record for Sunda Teal Anas gibberifrons, Grey Duck Anas superciliosa, Greater Flameback Chrysocolaptes lucidus in Kalimantan. Greater Flameback Chrysocolaptes lucidus is specific species for mangrove with very limited information about its distribution.

Non-bird biodiversity: Orcaella brevirostris, Presbytis rubicunda, Hylobathes muelleri, Nasalis larvatus and Crocodylus porosus (Eve & Guigue 1989)

Habitat and land use
Mangrove and nypah forest (50%), degradated tidal swamp vegetation and fish pond (30%), industral area and settlement (20%). Activities in this area are fisheries, logging, and industry (mainly oil).

Pressure/threats to key biodiversity
Forest conversion for fish ponds and infrastructure development (Anon 1995).

Protected areas
Included in proposed Pantai Samarinda Nature Reserve (95000 ha).

Recommended citation
BirdLife International (2023) Important Bird Area factsheet: Delta Mahakam. Downloaded from on 28/09/2023.