Arthur Hay, 9th Marquess of Tweeddale

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Colonel Arthur Hay, 9th Marquess of Tweeddale (9 November 1824 – 29 December 1878), known before 1862 as Lord Arthur Hay and between 1862 and 1876 as Viscount Walden, was a Scottish soldier and ornithologist. He was born at Yester, Gifford, East Lothian. He served as a soldier in India and the Crimea. He succeeded his father in the marquessate in 1876. He died at Chislehurst, and was succeeded by his brother.

Hay purchased a lieutenantcy in the Grenadier Guards[1] in 1841. He purchased a captaincy in 1846 and was promoted lieutenant-colonel without purchase in 1854 and Colonel in 1860. In 1866 he transferred to the 17th Lancers.

He was president of the Zoological Society of London from 16 January 1868.[2][3] His ornithological works were published privately in 1881 by his nephew, Captain Robert George Wardlaw-Ramsay, with a memoir by Dr W. H. Russell, and the attribution Walden is used in taxonomic listings.[4]

He had a private collection of birds,[5] insects, reptiles and mammals. He employed Carl Bock to travel to Maritime Southeast Asia and collect specimens. Tweeddale described about 40 species collected by Bock for the first time.


  1. ^ Singh, Bawa Satinder; Hardinge, Charles Stewart (2001). My Indian peregrinations: the private letters of Charles Stewart Hardinge, 1844-1847. Lubbock, Tex: Texas Tech University Press. p. 155. ISBN 0-89672-444-1. 
  2. ^ Celia Lowe (2006). Wild profusion: biodiversity conservation in an Indonesian archipelago. Princeton, N.J: Princeton University Press. p. 175. ISBN 0-691-12462-0. 
  3. ^ Scherren, Henry (1905). The Zoological Society of London. Cassell & Co. 
  4. ^ Ramsay, R G (1881) The ornithological works of Arthur, ninth Marquis of Tweeddale scanned
  5. ^ The History of the Collections Contained in the Natural History Departments of the British Museum. Adamant Media Corporation. 2000. p. 52. ISBN 1-4021-8140-X. 
Peerage of Scotland
Preceded by
George Hay
Marquess of Tweeddale
Succeeded by
William Hay