. Bulletin. Natural history; Natural history. Sept., 1970 Bellrose & Crompton: Migrational Behavior of Ducks. Fig. 10. — The longitudinal distribution of mallard indirect recoveries as compared with direct recoveries on the basis of mean and standard deviation lines. Mallards banded at the Spring Lake Refuge, Carroll County, Illinois, 1946-1948. in the immediate vicinity of the banding station. South of southern Illinois there was little difference in the axial or standard deviation lines until central Louisiana, and south, a region of few recoveries. Direct and indirect recoveries between
. Bulletin. Natural history; Natural history. Sept., 1970 Bellrose & Crompton: Migrational Behavior of Ducks. Fig. 10. — The longitudinal distribution of mallard indirect recoveries as compared with direct recoveries on the basis of mean and standard deviation lines. Mallards banded at the Spring Lake Refuge, Carroll County, Illinois, 1946-1948. in the immediate vicinity of the banding station. South of southern Illinois there was little difference in the axial or standard deviation lines until central Louisiana, and south, a region of few recoveries. Direct and indirect recoveries between 42° and 40° of latitude are largely from the Mississippi and Illinois River valleys, thereby accounting for the axial lines passing between these two river valleys. The plotting of individual direct recov- eries shows their distribution in the region of the Spring Lake banding sta-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
Size: 1480px × 1688px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
