TY - RPRT TI - Differentiating sex and species of Western Grebes ( Aechmophorus occidentalis ) and Clark's Grebes ( Aechmophorus clarkii ) and their eggs using external morphometrics and discriminant function analysis AU - C. Alex Hartman AU - Joshua T. Ackerman AU - Collin A. Eagles-Smith AU - Mark P. Herzog PY - 2016 DO - 10.1675/063.039.0103 UR - https://pubs.usgs.gov/publication/70170072 ID - 70170072 ER -