13837105 - A hippopotamus, Hippopotamus amphibius, exhaling as it emerges from a duckweed-covered pond. Mala Mala Game Reserve, South Africa.13837104 - A hippopotamus, Hippopotamus amphibius, partially submerged in a duckweed-covered pond. Mala Mala Game Reserve, South Africa.13837102 - A terrapin basks on the head of a hippopotamus, Hippopotamus amphibius, in a duckweed-covered pond. Mala Mala Game Reserve, South Africa.13811352 - American Bullfrog (Lithobates catesbeianus) in pond with duckweed Marion County, Illinois70342428 - Green Frog Rana clamitans melanota hiding in Duckweed70404059 - Green Frog Rana clamitans - New York - USA - in duckweed70404058 - Green Frog Rana clamitans - New York - USA - in duckweed71419598 - USA, Texas, Santa Clara Ranch. Leopard frog in duckweed-filled pond.70119872 - Nile Crocodile (Crocodylus niloticus); resting in a pond which is covered with duckweed. South Luangwa National Park, Zambia.70440506 - Malaysia, Borneo, Sandakan, crocodile resting in a pond with duckweed13925278 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 400X. On the right are visible diatoms closed in a special protecting case.\n13925044 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 200X\n13925041 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 200X\n13924513 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 200X\n13925443 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 200X\n13924948 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 400X. On the right are visible diatoms closed in a special protecting case.\n13834654 - A herd of African elephants, Loxodonta africana, gathered at a water hole. Linyanti, Botswana.13826171 - Detail, roots and water, The base of Vihara, Prasat Hin Phimai (Phimai Historical Park), Phimai, Nakhon Ratchasima province, Thailand13925243 - The image presents various tiny algae settled on Lemna sp. root, photographed through the microscope in polarized light at a magnification of 200X\n13924997 - The image presents diatoms closed in a special kind of the protecting case, photographed through the microscope in polarized light at a magnification of 400X\n13837103 - A hippopotamus, Hippopotamus amphibius, partially submerged in a pond. Mala Mala Game Reserve, South Africa.70352602 - Frogs, Usedom, Mecklenburg-Western Pomerania, Germany70247820 - Bridge, castle park Hoppenrade, Brandenburg, Germany71160554 - Aquatic Frog, Rana esculenta, Bavaria, Germany70331639 - Well at a rock at Monasterio de San Juan de la Pena monastery, Sierra de San Juan de la Pena, Province of Huesca, Aragon, Northern Spain, Spain, Europe70352575 - Frog, Usedom, Mecklenburg-Western Pomerania, Germany, Europe70246468 - Harris Railway Bridge over Mula river between Dapodi & Khadki near Pune, India70306658 - Wooden bridge in the landscape park at Agathenburg Castle, Stade, Lower Saxony, Germany
