That's because Egypt's best-known river is suffering from a crayfish invasion. Procambarus Clarkii to be exact. It's a native of Louisiana and relatively new to Egypt. Now it's clawing and burrowing ...

Smoke from burning dung rises near homes of mud and grass where thousands of people ... the largest wetlands in Africa, in the Nile River floodplain. But since the 1960s the swamp has kept growing ...

When water levels drop, they burrow into riverbanks or mud to stay cool and hydrated until the rains return. Despite being one of Africa's most resilient predators, Nile crocodiles face threats ...