disassortative mating behavior_NPS_DanielStahler (1) (IMAGE) University of Oxford Caption A gray male and black female are locked into a copulatory tie while other packmates gather around, demonstrating disassortative mate choice based on coat color. Credit: Daniel Stahler/NPS Credit Daniel Stahler/NPS Usage Restrictions No restrictions. License Public Domain 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.