Cowbirds Catherine and Joe Ortega Ph.D., from the 麻豆免费高清无砖码区biology department, have been studying cowbirds at SJBRC for 7 years. Catherine released a book entitled in Fall, 1998. They have published numerous publications using data collected at the Old Fort (referred to as the San Juan Basin Research Center) including: Improved Methods for Aging Second Year and After-Second Year Male Brown Headed Cowbirds Effects of Brown-Headed Cowbirds and Predators on the nesting success of Yellow Warblers in Southwest Colorado