Baron Christoph Freiherr Fellner von Feldegg (13 October 1779 – 10 May 1845, Leipzig) was an Austrian army officer and naturalist.

Fellner was born in a noble family in Krumau, Bohemia, where his father was a princely forester in Schwarzenberg.

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.

[1] 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.