white-necked jacobin, male plumage 2 (IMAGE) University of Washington Caption A white-necked jacobin hummingbird with male-like plumage. Credit Cornell Lab of Ornithology Usage Restrictions Must include credit License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.