R & E (1992): More common in the western half of the state.
R & E (1992): Although there are three late March records (at time of R & E), normally it is not seen until mid-April,
with peak in late April and early May. It is very rare during the last ten days of May.
March 20, 2012 - Earliest spring record
(1); Eagle Bluffs CA, Boone Co.; Grant Connette; 25th Annual MBRC Report, 2012-17.
March 24, 1977 - 2nd earliest spring record
(1); Cass Co.; JoAnn Garrett; R & E, BB 44:26.
April 8, 1894 - 2nd highest single day
(100); near Stotesbury, Vernon Co.; T. Surber; R & E, Widmann 1907.
April 22, 1987 - Highest eastern MO single day count
(47); Creve Coeur Lake, St. Louis Co.; K. Boldt et al.; R & E, BB 54:13.
May 31, 1976 - Listed in R & E (1992) as latest spring record
(1); Squaw Creek NWR, Holt Co.; Mark Robbins; R & E, BB 44:17.
R & E (1992): This species is more common in the western half of the state. Normally not seen until mid-April,
with the peak in late April and early May.
June 9, 2000 - 1st June record
(1); Stockton Reservoir, Polk Co.; Greg Swick, Phil Moran; 13th Annual MBRC Report; 2000-68.
July 8, 1978 - Earliest July record
(1); Trimble; Felicia Bart et al.; R & E, BB 45:12.
Note: At time of R & E there were no June records and only 4 July records.
R & E (1992): Migrants are scarce until mid-August, and only small numbers are normally encountered through September. Most of the larger concentrations are observed in October. A few are casually seen during the first two weeks of November.
Sept. 30, 1972
(Male); Specimen (NWMSU, DST 55); Maryville Sewage Lagoon, Nodaway Co.; No observer listed; R & E.
Oct. 17, 1981
(17); Pony Express CA, DeKalb Co.; Floyd Lawhon; R & E.
Oct. 26, 1999 - Highest single day count
(104); Smithville Lake, Clay Co.; Edge Wade et a; BB 67:42.
Oct. 27, 1974 - 3rd highest single day count
(56); Squaw Creek NWR, Holt Co.; Floyd Lawhon; R & E, BB 42:6.
Nov. 12, 1999 - 3rd latest fall record
(2); Truman Reservoir, east of Deepwater, Henry Co.; Mark Robbins; BB 67:42
Nov. 14, 1968 - 2nd latest fall record
(2); Swan Lake NWR, Chariton Co.; L. Kline, R & E, BB 36:12.
Nov. 19, 2007 - Latest fall record
(1); Squaw Creek NWR, Holt Co.; Larry Lade; BB 75:10.
Dec. 27, 2012-Jan. 21, 2013 - 1st winter record
(1), Winfield Lock & Dam, Lincoln Co; David Marjamaa (documentation with photographs), Mary Anne Marjamaa. 26th Annual
MBRC Report, 2013-17. On 18 February 2013, well beyond the final date of observation at Winfield,
Brad Jacobs observed an American Avocet at RMBS, about 25 miles southeast of the Winfield Dam. Presumably this
was the same individual.
Note: Any significant observations since R & E will be added at a later time.