Inventory of Bird Communities in Nimule National Park
Authors
Department of Wildlife Science College of Natural Resources and Environmental Studies University of Juba, Juba (South Sudan)
Department of Wildlife Science College of Natural Resources and Environmental Studies University of Juba, Juba (South Sudan)
Department of Wildlife Science College of Natural Resources and Environmental Studies University of Juba, Juba (South Sudan)
Article Information
DOI: 10.51244/IJRSI.2026.1308000287
Subject Category: Sciences
Volume/Issue: 13/8 | Page No: 4454-4492
Publication Timeline
Submitted: 2026-06-17
Accepted: 2026-06-22
Published: 2026-09-21
Abstract
This study provides a comprehensive inventory of the avian communities within Nimule National Park, South Sudan, addressing the critical need for baseline biodiversity data in this ecologically significant region. The primary objectives were to identify the taxonomic composition of resident bird species, determine their relative abundance across distinct habitat types, and evaluate how local environmental characteristics influence community structure and diversity. Utilizing the Time Species Count (TSC) method, which allows for standardized assessment of species richness and relative frequency over defined temporal intervals, researchers conducted systematic surveys across varied landscapes, including riverine forests, open woodlands, and savanna grasslands.
Keywords
The findings indicate a high level of avian richness, with numerous species identified across diverse families
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References
1. Ahmed, T. (2020). Spatial dynamics of human-wildlife conflict in South Sudan. African Conservation Journal. [Google Scholar] [Crossref]
2. Akugizibwe, T., Egeru, A., & Nampindo, S. (2021). Ecological dynamics of riverine forests in Northern Uganda. Journal of East African Conservation, 12(3), 45-58. [Google Scholar] [Crossref]
3. Bairlein, F. (2016). Migratory birds in a changing world. Journal of Ornithology, 157(1), 1-10. [Google Scholar] [Crossref]
4. Begon, M., Townsend, C. R., & Harper, J. L. (2021). Ecology: From individuals to ecosystems (5th ed.). Wiley. [Google Scholar] [Crossref]
5. Berkes, F. (2012). Sacred Ecology. Routledge. [Google Scholar] [Crossref]
6. Berthold, P., Gwinner, E., & Sonnenschein, E. (2020). Avian migration. Springer Nature. [Google Scholar] [Crossref]
7. Bibby, C. J., Burgess, N. D., Hill, D. A., & Mustoe, S. H. (2021). Bird census techniques. Academic Press. [Google Scholar] [Crossref]
8. Bibby, C. J., Burgess, N. D., Hill, D. A., & Mustoe, S. H. (2021). Bird census techniques (3rd ed.). Academic Press. [Google Scholar] [Crossref]
9. BirdLife International. (2022). State of the world's birds: Annual report on threatened species in East Africa. BirdLife International Press. [Google Scholar] [Crossref]
10. Blumstein, D. T., et al. (2005). Journal of Applied Ecology, 42(2), 268-277. [Google Scholar] [Crossref]
11. Brown, R. (2018). Trophic Dynamics in Tropical Savannahs. Academic Press. [Google Scholar] [Crossref]
12. Buckland, S. T., et al. (2015). Distance Sampling. Springer. [Google Scholar] [Crossref]
13. Butchart, S. H. M., et al. (2010). Global Biodiversity: Indicators of Recent Declines. Science, 328(5982), 1164-1168. [Google Scholar] [Crossref]
14. Bwogo, A. A., et al. (2012). Biodiversity of the Sudd Wetland: A Review of Historical and Contemporary Status. Journal of African Ornithology, 83(2), 145-160. [Google Scholar] [Crossref]
15. Caro, T. (2010). Conservation by Proxy. Island Press. [Google Scholar] [Crossref]
16. Chapin, James P. (1932). The Birds of the Belgian Congo. (Print, American Museum of Natural History) [Google Scholar] [Crossref]
17. Collar, N.J., and Stuart, S.N. (1985). Threatened Birds of Africa and Related Islands. (Print, ICBP) [Google Scholar] [Crossref]
18. Convention on Biological Diversity (CBD). (2021). Invasive Alien Species and Biodiversity. [Google Scholar] [Crossref]
19. Cornell Lab of Ornithology. (2022). Citizen Science in Tropical Ecosystems. [Google Scholar] [Crossref]
20. Danielsen, F., et al. (2005). On the Importance of Local Monitoring for Conservation. Conservation Biology, 19(4), 1166-1174. [Google Scholar] [Crossref]
21. Davies, L. (2022). Climate Change and Avian Phenology. Nature Conservation Journal. [Google Scholar] [Crossref]
22. Davis, L. (2023). Climate change impacts on sub-Saharan avian habitats. Global Ecology Review. [Google Scholar] [Crossref]
23. Digby, E. D., et al. (2013). Journal of Field Ornithology, 84(4), 415-424. [Google Scholar] [Crossref]
24. El-Moghraby, A. I. (2014). The White Nile: Ecology and Conservation. Springer. [Google Scholar] [Crossref]
25. El-Moghraby, A. I. (2018). The Ecology of the Nile Basin. Khartoum University Press. [Google Scholar] [Crossref]
26. Fair, J., et al. (2010). Guidelines to the Use of Wild Birds in Research. Ornithological Council. [Google Scholar] [Crossref]
27. Food and Agriculture Organization (FAO). (2020). Sustainable Non-Wood Forest Products. [Google Scholar] [Crossref]
28. Fry, C. H., & Keith, S. (2019). The birds of Africa: Volume VII: Sparrows to buntings. Bloomsbury Publishing. [Google Scholar] [Crossref]
29. Fuller, R. J. (2020). Birds and habitat: Relationships in changing landscapes. Cambridge University Press. [Google Scholar] [Crossref]
30. Gaston, K. J. (2010). Conservation Biology, 24(1), 14-27. [Google Scholar] [Crossref]
31. Gill, F., & Donsker, D. (2023). IOC World Bird List. [Google Scholar] [Crossref]
32. Global Bee Initiative. (2022). Pollinator Corridors in African Protected Areas. [Google Scholar] [Crossref]
33. Gomez, A., et al. (2021). Invasive Flora and Avian Niche Displacement. Journal of Ecology. [Google Scholar] [Crossref]
34. Government of South Sudan. (2021). National Land Policy and Conservation Guidelines. [Google Scholar] [Crossref]
35. Green, M., & White, R. (2020). Genetic consequences of habitat fragmentation in tropical forests. Journal of Conservation Genetics. [Google Scholar] [Crossref]
36. Hassan, F. (2021). Sampling Biases in Tropical Field Studies. Wildlife Research. [Google Scholar] [Crossref]
37. Hassan, K. (2021). Civil conflict and its aftermath on biodiversity in East Africa. Regional Environmental Studies. [Google Scholar] [Crossref]
38. International Centre for Research in Agroforestry (ICRAF). (2021). Agroforestry for Biodiversity Conservation. [Google Scholar] [Crossref]
39. International Union for Conservation of Nature (IUCN). (2020). Riparian Zone Management Guidelines. [Google Scholar] [Crossref]
40. Jago, N. D., et al. (2020). Climate Patterns of the Nile Valley. Journal of African Ecology. [Google Scholar] [Crossref]
41. Jansen, P. (2018). Hydro-ecology of the White Nile wetlands. Hydrology and Earth Systems. [Google Scholar] [Crossref]
42. Jetz, W., et al. (2007). Projected Impacts of Climate Change on Global Bird Diversity. PLoS Biology, 5(6), e157. [Google Scholar] [Crossref]
43. Jones, T., & Omondi, P. (2021). The Nile Corridor as a Migratory Pathway. African Birding Review. [Google Scholar] [Crossref]
44. Kalu, S. (2020). Thermal Refugia in Riverine Ecosystems. Tropical Biology. [Google Scholar] [Crossref]
45. Kato, P., & Ocan, J. (2020). Avian diversity and habitat structure in the White Nile catchment. Nile Basin Ecological Review, 8(2), 112-129. [Google Scholar] [Crossref]
46. Kingdon, Jonathan. (1989) Island Africa: The Evolution of Africa's Rare Animals and Plants. (Print, Princeton University Press) [Google Scholar] [Crossref]
47. Krebs, C. J. (2016). Ecological methodology (3rd ed.). Pearson. [Google Scholar] [Crossref]
48. Lado, M. (2019). Post-conflict recovery of grassland ecosystems in South Sudan. African Journal of Ecology, 57(4), 401-415. [Google Scholar] [Crossref]
49. Landis, J. R., & Koch, G. G. (2017). The measurement of observer agreement for categorical data. In Biostatistics: A methodology for the health sciences (pp. 521–535). [Google Scholar] [Crossref]
50. Laurance, W. F. (2019). Edge effects in tropical landscapes. Trends in Ecology & Evolution. [Google Scholar] [Crossref]
51. Lwanga, J. S., et al. (2011). Resource Partitioning in Tropical Savanna Birds. African Journal of Ecology, 49(3), 302-315. [Google Scholar] [Crossref]
52. Lynes, H. (1925). On the Birds of the Upper Nile. Ibis, 67(2), 403-437. [Google Scholar] [Crossref]
53. MacArthur, R. H. (1958). Population Ecology of Some Warblers of Northeastern Coniferous Forests. Ecology, 39(4), 599-619. [Google Scholar] [Crossref]
54. MacArthur, R. H., & MacArthur, J. W. (1961). Ecology, 42(3), 594-598. [Google Scholar] [Crossref]
55. MacArthur, R. H., & Wilson, E. O. (1967). The Theory of Island Biogeography. Princeton University Press. [Google Scholar] [Crossref]
56. MacArthur, Robert H., and Edward O. Wilson. (1967). The Theory of Island Biogeography. (Print) [Google Scholar] [Crossref]
57. MacKenzie, D. I., et al. (2006). Occupancy Estimation and Modeling. Academic Press. [Google Scholar] [Crossref]
58. MacKenzie, D. I., Nichols, J. D., Royle, J. A., Pollock, K. H., Hines, J. E., & Bailey, L. L. (2018). Occupancy estimation and modeling: Inferring patterns and dynamics of species occurrence. Elsevier. [Google Scholar] [Crossref]
59. Mackworth-Praed, C.W., and Grant, C.H.B. (1952). Birds of Eastern and North Eastern Africa. (Print, Longmans) [Google Scholar] [Crossref]
60. Magurran, A. E. (2017). Measuring biological diversity. John Wiley & Sons. [Google Scholar] [Crossref]
61. Magurran, Anne E. (2017). Measuring Biological Diversity. (Print, Blackwell Publishing) [Google Scholar] [Crossref]
62. Miller, D. (2017). Demographic Modeling for Avian Conservation. Springer. [Google Scholar] [Crossref]
63. Müller, A., & Scherr, S. (2021). Silvopastoral Systems and Avian Diversity. Journal of Sustainable Agriculture. [Google Scholar] [Crossref]
64. Muller, D., & Juma, A. (2022). The charcoal trade and forest degradation in East Africa. Resource Policy. [Google Scholar] [Crossref]
65. Muller, H. (2022). Edge Effects in Protected Areas. Conservation Biology. [Google Scholar] [Crossref]
66. Mundua, D. (2022). Ethnobotany and avian nesting preferences in Nimule National Park. Sudan Botanical Society Journal, 15(1), 22-38. [Google Scholar] [Crossref]
67. Ndang’ang’a, P. K., Sande, E., & Gichuki, N. (2017). Challenges of monitoring bird populations in East African wetlands. African Journal of Ecology, 55(3), 345-352. [Google Scholar] [Crossref]
68. Newton, I. (2003). The Speciation and Biogeography of Birds. Academic Press. [Google Scholar] [Crossref]
69. Newton, I. (2008). The Migration Ecology of Birds. Academic Press. [Google Scholar] [Crossref]
70. Nikolaus, G. (1989). Bird atlas of Sudan. Bonn: Zoologisches Forschungsinstitut und Museum Alexander Koenig. [Google Scholar] [Crossref]
71. Okello, J., & Kock, R. (2020). Transboundary wildlife corridors and their role in migration. African Journal of Ecology. [Google Scholar] [Crossref]
72. Okello, J., & Nyang, B. (2020). Anti-Poaching and Wildlife Success in East Africa. Journal of African Zoology. [Google Scholar] [Crossref]
73. Okello, J., et al. (2019). Community-Based Management in South Sudan National Parks. African Journal of Ecology. [Google Scholar] [Crossref]
74. Oksanen, J., et al. (2022). Package ‘vegan’. R Project. [Google Scholar] [Crossref]
75. Osei, B., & Mensah, K. (2021). Livestock grazing impacts on grassland bird nesting. Journal of Applied Ornithology. [Google Scholar] [Crossref]
76. Otieno, N. E., Odino, M., & Omondi, P. (2020). Avian community structure in response to seasonal rainfall in the Nile Basin. Journal of East African Ornithology, 12(2), 112-128. [Google Scholar] [Crossref]
77. Otim, F., Bua, B., & Okello, J. (2021). Invasive species and their impact on avian habitats in protected areas. Journal of Tropical Biodiversity, 19(2), 88-104. [Google Scholar] [Crossref]
78. Peterson, K. (2019). Avian Community Structures in the Nile Basin. International Ornithology. [Google Scholar] [Crossref]
79. Peterson, S. (2019). Ecotourism and its environmental footprints. Tourism Management Perspectives. [Google Scholar] [Crossref]
80. Pijanowski, B. C., et al. (2011). Soundscape Ecology. BioScience. [Google Scholar] [Crossref]
81. Pimm, S. L., et al. (2014). The biodiversity of species and their rates of extinction, distribution, and protection. Science, 344(6187). [Google Scholar] [Crossref]
82. Pomeroy, D. (2017). Birds of East Africa: An Ecological Perspective. Oxford University Press. [Google Scholar] [Crossref]
83. Pomeroy, D. (2018). Avian biodiversity and conservation in the Nile Basin. Journal of East African Natural History, 107(1), 45-62. [Google Scholar] [Crossref]
84. Pomeroy, Derek, and Mwema, John. (2012). Birds of East Africa: A Field Guide. (Print, Nature Kenya,) [Google Scholar] [Crossref]
85. Pomeroy, Derek. (2017). Birds of Uganda. (Print) [Google Scholar] [Crossref]
86. Ralph, C. J., et al. (1993). Handbook of Field Methods for Monitoring Landbirds. USDA Forest Service. [Google Scholar] [Crossref]
87. Robinson, T. (2022). Fire ecology and savanna bird communities. Savanna Research Institute. [Google Scholar] [Crossref]
88. Rodriguez, M., & Lee, P. (2019). Acoustic vs. Visual Detection in Dense Forests. Field Methods. [Google Scholar] [Crossref]
89. Royal Botanic Gardens. (2021). Seed Banking for Ecosystem Restoration. [Google Scholar] [Crossref]
90. Shannon, C.E. (1949). The Mathematical Theory of Communication. (Print, University of Illinois Press) [Google Scholar] [Crossref]
91. Simpson, E. H. (1949). Measurement of Diversity. Nature. [Google Scholar] [Crossref]
92. Sinclair, I., & Ryan, P. (2020). Complete photographic field guide: Birds of Southern Africa (3rd ed.). Struik Nature. [Google Scholar] [Crossref]
93. Smith, A., & Jones, B. (2021). Savanna-Forest Transitions in East Africa. Ecology Letters. [Google Scholar] [Crossref]
94. Smith, A., et al. (2021). Agricultural expansion and avian species richness in Nimule. Biodiversity Research. [Google Scholar] [Crossref]
95. Smith, J., et al. (2019). Vegetation Complexity and Avian Richness. Biodiversity Studies. [Google Scholar] [Crossref]
96. Stevenson, T., & Sutherland, W. J. (2021). Adapting to climate change: A framework for biodiversity management. Conservation Science and Practice, 3(4), e398. [Google Scholar] [Crossref]
97. Sutherland, W. J., & Stevenson, T. (2020). The role of evidence in conservation decision-making. Journal of Applied Ecology, 57(9), 1642–1650. [Google Scholar] [Crossref]
98. Sutherland, W. J., & Stevenson, T. (2023). Global priorities for environmental research and policy. Nature Sustainability, 6(2), 125–13. [Google Scholar] [Crossref]
99. TechConservation. (2023). Satellite monitoring for community-based biodiversity management. Tech Reports. [Google Scholar] [Crossref]
101. Tenywa, M., et al. (2019). Vegetation Mapping of Nimule National Park. Sudan Journal of Natural Resources. [Google Scholar] [Crossref]
102. Terborgh, J. (1992). Diversity and the Tropical Rain Forest. Scientific American Library. [Google Scholar] [Crossref]
103. Tewolde, A. (2017). Fire Management and Savannah Avifauna. Journal of Fire Ecology. [Google Scholar] [Crossref]
104. Thiollay, J. M. (1999). Ibis, 141(3), 361-375. [Google Scholar] [Crossref]
105. Thirgood, S., et al. (2005). Human-Wildlife Conflict: A Review of Solutions. Conservation Biology, 19(4), 1023-1031. [Google Scholar] [Crossref]
106. Thompson, R. (2020). Seasonal Biases in Avian Inventories. Ornithological Society. [Google Scholar] [Crossref]
107. United Nations Development Programme (UNDP). (2020). Energy Transitions in Rural African Communities. [Google Scholar] [Crossref]
108. United Nations Environment Programme (UNEP). (2021). Transboundary Conservation Frameworks. [Google Scholar] [Crossref]
109. UNWTO. (2022). Sustainable Ecotourism and Community Livelihoods. [Google Scholar] [Crossref]
110. Vanderbilt, E. (2018). Connectivity and Resilience in African Protected Areas. Conservation Science. [Google Scholar] [Crossref]
111. Wildlife Conservation Society (WCS). (2020). Bird Communities of Nimule National Park: A Baseline Survey. [Google Scholar] [Crossref]
112. Williams, C., & Thompson, D. (2022). The island effect: Avian diversity in fragmented landscapes. Journal of Biogeography. [Google Scholar] [Crossref]
113. World Bank. (2022). Micro-Finance and Sustainable Land Management. [Google Scholar] [Crossref]
114. World Health Organization (WHO). (2021). Sustainable Use of Medicinal Plants. [Google Scholar] [Crossref]