Boyd Alexander (January 16, 1873 - April 2, 1910) was an English Army officer, explorer and ornithologist.

Alexander was a member of an expedition which travelled across Africa from the Niger to the Nile and exploring the Lake Chad area. Alexander was accompanied by his brother Claud, Captain G. B. Gosling and José Lopes. In February 1904 they set off from the mouth of the Niger, travelling upriver to Lokoja. Claud died in October of enteric fever after making a survey of the Murchison Range . Boyd and Gosling explored the area around Lake Chad. Gosling died in June 1906 at Niangara of blackwater fever. Boyd then followed the River Kibali, reaching the Nile late in the year and returning to England in February 1907.

Alexander and Lopes sailed back to Africa in 1909. They visited Claud's grave at Maifoni in Bornu and then continued to Ouadai. Boyd was killed by in a dispute with locals near Nyeri. His body was recovered by French soldiers and buried next to his brother in Maifoni.

Reference

• Biographies for Birdwatchers, Barbara and Richard Mearns ISBN 0124874223