Robert Thomas Orr

1908 – 1994

• Vertebrate biology
• Natural history of the pallid bat, Antrozous pallidus
• Animals in migration
• Marine mammals of California
• Mushrooms and other common fungi of the San Francisco Bay region
• Mushrooms of western North America
• The animal kingdom
• The little-known pika
• Wildflowers of Western America
• A new rodent of the genus Nesoryzomys from the Galapagos islands
• Birds of the Lake Tahoe region
• Mammals from Sikang, China