Whale shark (Rhincodon typus) feeding at the surface on zooplankton, mouth open, known as ram feeding, Yum Balam Marine Protected Area, Quintana Roo, Mexico, North America

Scientist and whale shark (Rhincodon typus) feeding at the surface on zooplankton, mouth open, known as ram feeding, Yum Balam Marine Protected Area, Quintana Roo, Mexico, North America

Bighorn sheep (Ovis canadensis) ram eating in the winter, Yellowstone National Park, Wyoming, United States of America, North America

Bighorn Sheep (Ovis canadensis) ram feeding, Yellowstone National Park, Wyoming, United States of America, North America

Rocky Mountain Bighorn Ram grazing with mountains in background (Ovis canadensis), Jasper National Park, UNESCO World Heritage Site, Alberta, Canada, North America

Snorkeller and whale shark (Rhincodon typus) feeding at the surface on zooplankton, mouth open, known as ram feeding, Yum Balam Marine Reserve, Quintana Roo, Mexico, North America

Dall Sheep rams (Ovis dalli) grazing on grass in the high country in Denali National Park and Preserve in Interior Alaska in autumn. Rams often travel in groups during this pre-rut time of year, Alaska, United States of America