Claudio Contreras / Streak-backed Oriole (Icterus pustulatus graysonii) on prickle-pear cactus. Maria Cleofas Island, Islas Marias Biosphere Reserve, Sea of Cortez (Gulf of California), Mexico, August.

Kevin Schafer / Yellow Prickle (Zanthoxylum monophyllum) with spikes on trunk in lowland rainforest, Los Haitises National Park, Dominican Republic

Pete Oxford / Creolefish (Paranthias furcifer), Bonaire, Netherlands Antilles, Caribbean

Tui De Roy / Silky Shark (Carcharhinus falciformis) feeding frenzy runners preying on Creolefish (Paranthias furcifer), Wenman Island, Galapagos Islands, Ecuador

Tui De Roy / Green Sea Turtle (Chelonia mydas) in coastal shallows with schooling Creolf Fish (Paranthias furcifer) endangered, Devil's Crown, Floreana Island, Galapagos Islands, Ecuador