Annual rainfall ranges from 381 cm. 250 tribal groups, Hausa-Fulani, Ibo, and Yoruba are the largest. Muslim, Christian, indigenous African. Green, white, and green vertical bands. Persons arriving in Nigeria must have valid passports and visas obtained from the Nigerian embassy or consulates.
Malaria is endemic, and suppressants are recommended.
Tap water is not potable. Fruits and vegetables should be carefully prepared and meats cooked until well done. Telephone calls to the US and Europe are via satellite. Facilities exist for overseas cables, telexes, and radiotelephone messages to ships at sea. Lagos is 6 hours ahead of Eastern Standard Time.