Fellner was born in a noble family in
Český Krumlov, Bohemia, where his father was a princely forester of the
Schwarzenberg family. Fellner went to a military academy in Vienna and in 1808, became a sub-lieutenant in an army battalion and fought in the
Battle of Aspern-Essling under
Archduke Karl Ferdinand. He also served in the Regiment de Vaux in 1813 where he distinguished himself. In 1815, he was knighted in the
Military Order of Maria Theresa. Feldegg fought in the
Napoleonic Wars and in recognition of his many gallant deeds was created a Baron in 1817. He served in
Dalmatia, eventually becoming
Colonel and
Commanding Officer of the 6th Battalion of Chasseurs. Feldegg took a special interest in the birds of Dalmatia and accumulated a large collection of
natural history specimens. He was a correspondent of
C. L. Brehm,
John Gould and
Hermann Schlegel, and served for a time with the ornithologist Dr
Karl Michahelles. His collection was donated to the
Natural History Museum in Prague. Feldegg had a number of birds named after him, including a subspecies of the
Lanner falcon Falco biarmicus feldeggi and the black-headed wagtail,
Motacilla flava feldegg, the Balkan and Black Sea sub-species of the
yellow wagtail. ==References==