After completing his education at
Bedford, Rosevear graduated in 1923 with a
Bachelor of Arts degree and a Diploma in
Forestry from
Christ's College,
University of Cambridge. In 1924 he moved to
Nigeria, where he joined the Colonial Forest Service. Rosevear was an active supporter of the
Nigerian Field Society (NFS), founded in 1930 by Frank Bridges. He published numerous articles in
The Nigerian Field, the journal of the Nigerian Field Society, and served as vice-president of the society from 1947 to 1976. In 1944 Rosevear settled in
Ibadan and in 1951 he became Inspector-General of Forests in
Lagos. In 1954 he left active forest service and returned to
Britain. In
London he worked as an Honorary Associate at the
Natural History Museum, where he worked for over 20 years with the support of the
Wellcome Trust and the
Leverhulme Trust. == Honors ==