Frederick Nutter Chasen was an English

England

England is a country that is part of the United Kingdom. It shares land borders with Scotland to the north and Wales to the west; the Irish Sea is to the north west, the Celtic Sea to the south west, with the North Sea to the east and the English Channel to the south separating it from continental...

 zoologist.

Chasen was appointed Assistant Curator of the Raffles Museum in Singapore

Singapore

Singapore , officially the Republic of Singapore, is a Southeast Asian city-state off the southern tip of the Malay Peninsula, north of the equator. An island country made up of 63 islands, it is separated from Malaysia by the Straits of Johor to its north and from Indonesia's Riau Islands by the...

 in 1921, and Director in 1932 in succession to Cecil Boden Kloss

Cecil Boden Kloss

Cecil Boden Kloss was an English zoologist. He was an expert on the mammals and birds of Southeast Asia.In the early 1900s Kloss accompanied the American naturalist William Louis Abbott in exploring the Andaman and Nicobar islands. From 1908 he worked under Herbert Christopher Robinson at the...

. He was an authority on Southeast Asia

Southeast Asia

Southeast Asia, South-East Asia, South East Asia or Southeastern Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia. The region lies on the intersection of geological plates, with heavy seismic...

n birds and mammals. He prepared the third and fourth volumes of Herbert Christopher Robinson

Herbert Christopher Robinson

Herbert Christopher Robinson was a British zoologist and ornithologist. He is principally known for conceiving and initiating the major ornithological reference The Birds of the Malay Peninsula....

's The Birds of the Malay Peninsula

The Birds of the Malay Peninsula

The Birds of the Malay Peninsula is a major illustrated ornithological reference work conceived and started by Herbert Christopher Robinson. The full title is The Birds of the Malay Peninsula: a general account of the birds inhabiting the region from the isthmus of Kra to Singapore with the...

. He died when attempting to flee Singapore early in 1942, following Japanese forces' occupation

Battle of Singapore

The Battle of Singapore was fought in the South-East Asian theatre of the Second World War when the Empire of Japan invaded the Allied stronghold of Singapore. Singapore was the major British military base in Southeast Asia and nicknamed the "Gibraltar of the East"...

of the island, when the ship he was on was sunk by enemy action.