Crematogaster nigeriensis is a polygynous ant species with colonies that can contain up to 10,000 workers. They have a fast development speed and the queen is about 8.5-9.5 mm in size while workers are 3.2-3.8 mm. They have a brown body and black abdomen. Their nutrition consists of food insects, syrup, fruit, vegetables, jelly, and cooked chicken without bones.