Erwin E. Klaas

• Summer Birds From the Yucatan Peninsula, Mexico
• Cowbird parasitism and nesting success in the eastern phoebe
• Dabbling duck recruitment in relation to habitat and predators at Union Slough National Wildlife Refuge, Iowa
• Recovery plan for the brown pelican, Pelicanus occidentalis occidentalis, in Puerto Rico and the U.S. Virgin Islands
• Summer birds from the Yucatan Peninsula, México