Greater Cormorant (827 individuals) and Great White Pelican (12) — two very different strategies for catching fish at Uganda's major water bodies, compared across 14 visits and 65 days
They both eat fish, and they both dominate the visual drama of Uganda's water bodies. But the Greater Cormorant and the Great White Pelican represent two entirely different evolutionary answers to the challenge of catching fish in open water. The cormorant dives and pursues; the pelican scoops and herds. Uganda's monitoring network records 827 Greater Cormorants and 12 Great White Pelicans — a ratio that reflects both the cormorant's greater abundance and the pelican's status as an occasional visitor rather than a permanent resident.
The Greater Cormorant (Phalacrocorax carbo) is built for underwater pursuit. Its body is dense and streamlined, its feet large and fully webbed, positioned far back on the body for powerful underwater propulsion. It lacks the waterproofing oils of most waterbirds — a trade-off that makes it a faster, more manoeuvrable swimmer but requires it to dry its wings after each bout of diving. Adults can dive to 4–8 metres depth and pursue individual fish with sustained underwater chases lasting up to 45 seconds. The hooked bill tip grips even large, struggling prey securely.
The Great White Pelican (Pelecanus onocrotalus) takes a completely different approach. Its enormous throat pouch — which can hold up to three times the volume of its stomach — acts as a net, scooping fish from just below the surface. Pelicans frequently fish cooperatively: groups of 8–20 birds form a line or horseshoe formation and advance through shallow water, driving fish ahead of them into increasingly concentrated shoals before simultaneously lunging and scooping. This group fishing strategy is spectacularly efficient when fish are schooling in shallow bays, but requires open, calm, relatively shallow water and the social cohesion that comes from breeding in large colonies.
At Uganda's major water bodies, the cormorant's more flexible foraging style — individual birds can exploit almost any clear water body of suitable depth — explains why 827 individuals are distributed across the network while the pelican's 12 individuals cluster at the few sites with the specific conditions (large, open, shallow, undisturbed) that support cooperative group fishing.
The 827 Greater Cormorants in Uganda's monitoring network are concentrated at two sites that represent the best of Uganda's protected large water bodies: Murchison Falls National Park (354 individuals) and Kazinga Channel in Queen Elizabeth National Park (281 individuals). The remaining 192 individuals are distributed across additional sites including Lake Victoria shoreline locations.
Both top sites are within national parks where fishing pressure is controlled or absent, and where the combination of large, productive water bodies and minimal boat disturbance creates ideal conditions for large diving birds. The Victoria Nile at Murchison — turbulent, oxygenated and fish-rich below the falls — concentrates cormorants in numbers rarely seen elsewhere in East Africa. Fourteen personal visits across Uganda's water bodies, totalling 65 days, confirmed the species as a constant presence at both sites: groups of 15–30 birds occupying the same riverside trees on successive visits, maintaining colonial roosting traditions that appear stable over years.
The Great White Pelican is one of the world's largest flying birds — wingspans exceed 3 metres, and adults weigh up to 15 kilograms. At Lake Victoria, it appears occasionally rather than regularly: the 12 individuals in the monitoring dataset represent a fraction of the encounters possible at the lake's larger open-water sites, particularly near the lake's outlet into the Victoria Nile and at Lake Albert, where the species is more frequently recorded.
Uganda's pelican population consists primarily of non-breeding dispersers from colonies further north and east — principally Lake Natron in Tanzania, Lake Turkana in Kenya, and sites in Ethiopia. These birds move widely across East Africa outside the breeding season, and Uganda's sightings peak when dispersal from northern colonies is at its height, typically in the post-breeding dry season. The spectacular sight of a group of Great White Pelicans in cooperative fishing formation — white wings spanning 3 metres, pouches swinging with each scoop — is among the most memorable waterbird spectacles in East Africa.
Across 14 visits and 65 days in the field at Uganda's major water bodies, Greater Cormorants were encountered on every single visit to Murchison Falls and Kazinga Channel — typically in roost groups of 20–50 birds in riverside trees, with foraging individuals visible throughout the boat trips. The species became a reliable baseline against which to measure the productivity of each site: a large roosting colony signals abundant fish, consistent use of the same trees year after year signals undisturbed conditions.
Great White Pelicans were encountered on fewer occasions — always a memorable event, typically a small group of 3–8 birds gliding low over open water or gathered in a loose raft on the lake surface. Their very large size and brilliant white plumage make them visible at extraordinary distances, and the sight of pelicans circling in a thermal above Lake Albert or the Victoria Nile delta carries a particular quality of grandeur difficult to convey in species accounts.
354 Greater Cormorants. Great White Pelican at Victoria Nile delta / Lake Albert. Daily boat trip from Paraa.
281 Greater Cormorants. Pelicans occasional. Daily launch from Mweya Peninsula in Queen Elizabeth NP.
Most reliable Great White Pelican location in northern Uganda. Open shallow lake margin at Victoria Nile delta. Best in Dec–Mar.
Cormorants are pursuit divers — they swim underwater, chasing individual fish and gripping them with a hooked bill. Pelicans are surface scoopters — the Great White Pelican uses its enormous throat pouch to scoop fish from the surface, often working in coordinated groups that herd fish into shallow water.
The Great White Pelican is recorded in small numbers in Uganda (12 individuals in monitoring data). It is most reliably seen at Lake Albert and the Victoria Nile delta near Murchison Falls, and occasionally at Lake Victoria's larger open-water sites. Most individuals are dispersing non-breeders from colonies further north.
827 Greater Cormorant individuals were recorded in the monitoring network. Top sites: Murchison Falls NP (354) and Kazinga Channel (281).
Direct competition is limited — cormorants pursue individual fish underwater while pelicans scoop schooling fish at the surface. They often forage at the same sites without significant interference, targeting different fish sizes and using different water depths.
Least Concern globally by IUCN, but subject to wetland loss and colony disturbance in East Africa. In Uganda the species is an occasional visitor rather than a resident; its conservation depends on conditions at breeding colonies in Ethiopia, Sudan and Kenya.
Murchison Falls and Kazinga Channel boat trips deliver the most reliable encounters with both species — alongside hippos, crocodiles, African Fish Eagle and some of Africa's finest large-mammal scenery.
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