Claudia Bernadine Elisabeth Hartert

• Name — Claudia Bernadine Elisabeth Hartert • Birth Name — Claudia Endris • Born — 21 June 1863 • Birthplace — Coesfeld, Kingdom of Prussia • Died — 24 August 1958 • Place of death — Hilversum, Netherlands • Occupation — Ornithologist, illustrator • Spouse — Ernst Hartert (m. July 1891) • Children — Joachim Karl Hartert (1893–1916) • Mother — Alwine Florentine Sophie Böcker • Father — Lieutenant Colonel Joachim Endris

Born Claudia Endris (or Endriss) (21 June 1863 in Coesfeld, Germany), Claudia's father was Lieutenant Colonel Joachim Endris, her mother's name was Alwine Florentine Sophie, née Böcker. Claudia's older brother was Gustav Joachim (born 1862). In July 1891, Claudia married the ornithologist Ernst Hartert in Frankfurt am Main, Germany. They had a son named Joachim Karl Hartert (1893–1916), who was killed as an English soldier during the Battle of the Somme in France.

On 4 May 1892 Claudia Hartert and her husband left Le Havre, France, for an extended trip to the West Indies in the Caribbean Sea. On 19 May they reached the island of Saint Thomas, where Claudia saw her first hummingbird, a blue star Antilles. Together with her husband she was the first to describe the blue-tailed Buffon hummingbird subspecies (Chalybura buffonii intermedia E. Hartert & C. Hartert, 1894). The article "On a collection of Humming Birds from Ecuador and Mexico" appears to be their only joint publication. In The Feathered World (Die Gefiederte Welt) she published many observations and illustrations from her trip to the West Indies. In October 1882, the Hartert couple moved to Tring, England, to work with Walter Rothschild, 2nd Baron Rothschild. Ernst became the director of the Natural History Museum at Tring, which at the time was privately owned by Rothschild. Claudia managed the museum's library for at least a few years. The couple lived a normal life there despite their dual allegiances to Germany and England until the beginnings of World War I. While in Tring, Claudia's husband became a naturalized English citizen, according to an excerpt of a May 1915 letter from Claudia Hartert in Tring to Mrs. Noerdlinger, wife of Eugene Robert Noerdlinger, "German suspect, resident in Jersey". We have now been 24 years in England. How English people have gone down in my esteem. I am too much of a German to be able to think otherwise. My young son was at Oxford when he had to become a soldier, thank God he is still in our neighborhood.... My husband it is true has been naturalized for 13 years, or more, but is not a born native.

Claudia Hartert retained her English citizenship after moving to Berlin in 1930. Her husband died there in 1933. In 1939, due to political difficulties, and with the help of British ornithologist Phyllis Barclay-Smith, she moved from Berlin to the St. Willebrordus nursing home in Wassenaar, Netherlands. On 21 August 1940, Hartert moved to the St. Carolus nursing home in Hilversum, Netherlands, where she lived until her death 24 August 1958, at 95 years of age.

• In 1922 John David Digues La Touche named Claudia's leaf warbler (Phylloscopus claudiae (La Touche, 1922)) after Mrs. Hartert. • Heliangelus claudia E. Hartert, 1895 is today considered a synonym for the Longuemare's sunangel (Heliangelus clarisse (Longuemare, 1841)). • The genus Claudia E. Hartert, 1896 is today a synonym for Tachornis Gosse, 1847. (Hartert himself corrected the name in 1916 after advice from Charles Chubb (1851–1924) and Tom Iredale (1880–1972) with Reinarda, because the name Claudia Stål, 1865 had already been assigned.)

The canonical record carries the following identifying particulars.

The following is established of origins and background. Born in 1863 at Coesfeld. Institutional cataloguing adds that claudia Bernadine Elisabeth Hartert died in 1958 at Hilversum.