Lake Victoria (East Africa) has no flamingos. It's a deep freshwater lake (max ~80 m)—too deep for flamingos to feed (they need shallow, alkaline/saline waters to filter-feed on crustaceans and algae).
Flamingos concentrate in soda lakes like Nakuru, Bogoria, Natron, and Manyara in the Rift Valley—shallow, hyper-alkaline, rich in Arthrospira (spirulina) and brine shrimp.
Lake Victoria's ecology centers on cichlid fish, Nile perch, tilapia, and papyrus wetlands—not flamingo food webs.