TY  - RPRT
TI  - The relationship between annual survival rate and migration distance in mallards: An examination of the time-allocation hypothesis for the evolution of migration
AU  - J.B. Hestbeck
AU  - J.D. Nichols
AU  - J.E. Hines
PY  - 1992
DO  - 10.1139/z92-273
UR  - https://pubs.usgs.gov/publication/5222922
ID  - 5222922
ER  -