T. C. Schneirla

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T. C. Schneirla
Theodore Christian Schneirla.jpg
Born (1902-07-23)July 23, 1902
Bay City, Michigan, United States
Died August 20, 1968(1968-08-20)
New York City
Nationality American
Fields Biologist
Institutions American Museum of Natural History
Alma mater University of Michigan

Theodore Christian Schneirla (July 23, 1902, Bay City, Michigan — Aug. 20, 1968, New York, N.Y.) was an American animal psychologist who performed some of the first studies on the behavior patterns of army ants.

Schneirla was educated at the University of Michigan, Ann Arbor (M.S., 1925; Sc.D., 1928), and joined the staff of New York University in 1928. He made the first of eight trips to the Barro Colorado Island, Panama Canal Zone, to study the behavior of army ants in 1932. His “Studies on Army Ants in Panama,” published the next year, provided new insight into their behavior. He discovered that these ants operate on a 36-day cycle consisting of a 16-day nomadic pattern followed by a 20-day stationary phase. In 1934 he reported that ants follow a particular pattern when moving into new territory and that raids by these insects peak once during the morning and again in the afternoon. Sudden changes in weather also were found to give rise to sudden bursts of activity. In 1944 he showed that their raids were caused by the level of excitability of the ant colony and not by a scarcity of prey.

In 1943 Schneirla became associate curator of the Department of Animal Behavior at the American Museum of Natural History, New York City. After his return from a study of army ants in southern Mexico, he became the full curator of the museum in 1947.

Schneirla was the author of a large number of scientific papers and the coauthor of several books on psychology, including Principles of Animal Psychology (with N.R.F. Maier; 1935) and Recent Experiments in Psychology (with L.W. Crafts; 1938).


  • Maier, N. R. F., Théodore Christian Schneirla, T. C., (1935) "Principles of animal psychology". McGraw-Hill Book Company
  • Aronson, L. R., Tobach, E., Rosenblatt, J. S., Lehrman, D. S. (Eds.) (1972) "Selected writings of T. C. Schneirla". Oxford, England: W.H. Freeman & Co.


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