Kenya's Rift Valley flamingos losing pink coloration

Greater flamingos in Kenya's Rift Valley lakes are losing their pink coloration due to changes in lake ecosystems [1, 2].

This loss of color serves as a visible indicator of ecological distress in the Great Rift Valley. Because the birds' hue depends entirely on their diet, the fading color signals a collapse in the primary food sources that sustain these populations [1, 3].

The phenomenon is occurring primarily across Lakes Nakuru, Elementaita, and Bogoria [1, 2]. These birds derive their pink pigment from cyanobacteria, a type of algae that they consume in large quantities [1, 2]. When the algae thrive, the flamingos maintain their vibrant appearance; however, current environmental shifts are disrupting this biological process [1, 3].

Several factors have contributed to the decline of these pigment-producing algae. Altered water levels, pollution, and the presence of invasive species have disrupted the growth of the cyanobacteria [1, 3]. These changes have fundamentally shifted the chemistry and biological makeup of the lakes — making it difficult for the specific algae to flourish.

Environmental reports published this Tuesday indicate that the birds are fading to white as their food source is threatened [1, 3]. The lack of carotenoids from the algae means the birds cannot maintain their plumage color, which is a direct result of their nutritional intake ^[2].

Conservationists monitor these lakes as critical habitats for the *Phoenicopterus roseus* species [1, 2]. The decline in coloration is viewed as a warning sign regarding the overall health of the Rift Valley lakes and the stability of the avian populations that rely on them ^[1].