Mitsuaki Iwago / Blue Wildebeest (Connochaetes taurinus) mother giving birth, Serengeti

Konrad Wothe / African Elephant (Loxodonta africana) females tending to newborn calf, Kenya

Norbert Wu / Spotted Seahorse (Hippocampus erectus) male who has just given birth to babies, surrounded by his offspring

Norbert Wu / Weddell Seal (Leptonychotes weddellii) mother and newborn pup, Antarctica

Ralph Pace / Tourists and calving glacier, South Sawyer Glacier, Alaska

Yva Momatiuk & John Eastcott / Ice calving off glacier, Lake Argentino, Los Glaciares National Park, Patagonia, Argentina

Jaymi Heimbuch / Large piece of ice calving off Johns Hopkins Glacier, Glacier Bay National Park, Alaska

Vincent Grafhorst / Grant's Zebra (Equus burchellii boehmi) mother cleaning newborn, Amboseli National Park, Kenya

D. Parer & E. Parer-Cook / Tammar Wallaby (Macropus eugenii) fetus being born, still covered in membrane, Australia

D. Parer & E. Parer-Cook / Tammar Wallaby (Macropus eugenii) baby after clearing through the fetal membrane with its sharp claws, it begins to climb up toward the pouch with a swimming motion, Australia

D. Parer & E. Parer-Cook / Tammar Wallaby (Macropus eugenii) birth, baby is born enclosed in fetal membranes, Australia

Hiroya Minakuchi / Ice falling off glacier, Alaska

Michele Westmorland / Northern / lined seahorse (Hippocampus erectus) male after birthing a pouch full of babies. St Vincent, West-Indies, Caribbean, May.

Michele Westmorland / Northern / lined seahorse (Hippocampus erectus) male after birthing a pouch full of babies. St Vincent, West-Indies, Caribbean, May.

Winfried Wisniewski / Blue Wildebeest (Connochaetes taurinus) female giving birth to calf, Serengeti National Park, Tanzania

Hiroya Minakuchi / Calving glacier, Alaska

Ingo Arndt / Pea Aphid (Acyrthosiphon pisum) giving birth, Germany

Hiroya Minakuchi / Glacier calving, Alaska

Konrad Wothe / Guanaco (Lama guanicoe) birthing, Torres del Paine National Park, Patagonia, Chile

Matthias Breiter / Glacial ice calving into the water, Sawyer Glacier, Tracy Arm Fjord, Alaska

Konrad Wothe / Dawes Glacier calving, Endicott Arm, Inside Passage, Alaska

Suzi Eszterhas / Northern Elephant Seal (Mirounga angustirostris) female giving birth, Ano Nuevo State Reserve, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) female giving birth, San Miguel Island, Channel Islands National Park, California

Mark Moffett / Chinese Mantis (Tenodera aridifolia) nymphs emerging from eggmass, North America

Mark Moffett / Chinese Mantis (Tenodera aridifolia) nymph emerging from eggmass, North America

Suzi Eszterhas / California Sea Lion (Zalophus californianus) mother and newborn pup, San Miguel Island, Channel Islands National Park, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) mother and newborn pup, San Miguel Island, Channel Islands National Park, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) mother and newborn pup, San Miguel Island, Channel Islands National Park, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) mother and newborn pup, San Miguel Island, Channel Islands National Park, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) giving birth, San Miguel Island, Channel Islands National Park, California

Suzi Eszterhas / California Sea Lion (Zalophus californianus) giving birth, San Miguel Island, Channel Islands National Park, California

Piotr Naskrecki / Western Nimba Toad (Nimbaphrynoides occidentalis) unique among amphibians to give birth to live, fully formed young toads, allowing it to survive in environments with unpredictable availability of wat...

Hiroya Minakuchi / Orca (Orcinus orca) giving birth, Sea World, Kamogawa, Japan

Colin Monteath / Pack ice and calving icebergs, aerial view of Mertz Glacier, Terre Adelie Land, east Antarctica

Michael & Patricia Fogden / Marsupial Frog (Gastrotheca ovifera) female releasing 37 froglets from pouch, cloud forest, Venezuela

Mitsuaki Iwago / Blue Wildebeest (Connochaetes taurinus) mother and newborn, Serengeti

Konrad Wothe / Southern Hawker Dragonfly (Aeshna cyanea) newly emerged from chrysalis, Munich, Germany

Michael & Patricia Fogden / Hog-nosed Pit Viper (Bothrops nasutus) female giving birth to live young, rainforest Costa Rica

Michael & Patricia Fogden / Black-banded Coral Snake (Micrurus nigrocinctus) hatching from egg, rainforest, Costa Rica

Michael & Patricia Fogden / Pygmy Marsupial Frog (Flectonotus pygmaeus) female releasing tadpoles into water pooled in bromeliad, cloud forest, Venezuela

Konrad Wothe / Hooker's Sea Lion (Phocarctos hookeri) mother giving birth to pup, Enderby Island, Auckland Islands, New Zealand

Konrad Wothe / Hooker's Sea Lion (Phocarctos hookeri) mother giving birth to pup, Enderby Island, Auckland Islands, New Zealand

Norbert Wu / Weddell Seal (Leptonychotes weddellii) mother and pup, Antarctica

Michio Hoshino / Hubbard Glacier calving, Alaska

Michio Hoshino / Hubbard Glacier calving, Alaska

Tui De Roy / Galapagos Sea Lion (Zalophus wollebaeki) female giving birth at dusk, Punta Espinoza, Fernandina Island, Galapagos Islands, Ecuador

Norbert Wu / Weddell Seal (Leptonychotes weddellii) mother and newborn pup, Antarctica

ZSSD / Giant Panda (Ailuropoda melanoleuca) screen shot from the Panda cam showing mother Bai Yun in her birthing den with her five day old baby Hua Mei, native to Asia

Tui De Roy / Perito Moreno Glacier being cut back by water pressure from trapped Lake Argentina, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Perito Moreno Glacier being cut back by water pressure from trapped Lake Argentina, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Perito Moreno Glacier being cut back by water pressure from trapped Lake Argentina, Los Glaciares National Park, Patagonia, Argentina

Tui De Roy / Perito Moreno Glacier actively advancing into Lake Argentina, Los Glaciares National Park, Argentina

Flip Nicklin / Swell Shark (Cephaloscyllium ventriosum) egg cases with embryos, sometimes called mermaid's purses, the pups will hatch in 7-10 months

Jaymi Heimbuch / Northern Elephant Seal (Mirounga angustirostris) female giving birth, Piedras Blancas, San Simeon, California

Flip Nicklin / Tourists watching calving glacier, Alaska

Yva Momatiuk & John Eastcott / Ice calving off glacier, Lake Argentino, Los Glaciares National Park, Patagonia, Argentina, sequence 4 of 4

Yva Momatiuk & John Eastcott / Ice calving off glacier, Lake Argentino, Los Glaciares National Park, Patagonia, Argentina, sequence 3 of 4

Yva Momatiuk & John Eastcott / Ice calving off glacier, Lake Argentino, Los Glaciares National Park, Patagonia, Argentina, sequence 2 of 4

Yva Momatiuk & John Eastcott / Ice calving off glacier, Lake Argentino, Los Glaciares National Park, Patagonia, Argentina, sequence 1 of 4

Yva Momatiuk & John Eastcott / Ice calving off glacier, Lake Argentino, Los Glaciares National Park, Patagonia, Argentina

Jaymi Heimbuch / Large piece of ice calving off Johns Hopkins Glacier, Glacier Bay National Park, Alaska

Jeff Foott / Petroglyphs made by Ancestral Puebloans, Birthing Panel, Grand Gulch, Cedar Mesa, Bears Ears National Monument, Utah

Jeff Foott / Petroglyphs made by Ancestral Puebloans, Birthing Panel, Grand Gulch, Cedar Mesa, Bears Ears National Monument, Utah

Jeff Foott / Petroglyphs made by Ancestral Puebloans, Birthing Panel, Grand Gulch, Cedar Mesa, Bears Ears National Monument, Utah

Richard Du Toit / Springbok (Antidorcas marsupialis) female standing immediately after giving birth, Kgalagadi Transfrontier Park, South Africa, sequence 3 of 4

Richard Du Toit / Springbok (Antidorcas marsupialis) female standing immediately after giving birth, Kgalagadi Transfrontier Park, South Africa, sequence 2 of 4

Richard Du Toit / Springbok (Antidorcas marsupialis) female lying down to give birth, Kgalagadi Transfrontier Park, South Africa, sequence 1 of 4

Hiroya Minakuchi / Ice falling off glacier, Alaska

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) keeper Gao Qiang sprays disinfectant on straw mats for Lei Lei's bedroom in preparation for her possible birthing, China Conservation and Research Center for the G...

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) keeper Gao Qiang sprays disinfectant on straw mats for Lei Lei's bedroom in preparation for her possible birthing, China Conservation and Research Center for the G...

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) Gongzhu licking her vulva and eating afterbirth after giving birth, common postpartum behavior, China Conservation and Research Center for the Giant Panda, Wolong...

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) Gongzhu licking her vulva and eating afterbirth after giving birth, common postpartum behavior, China Conservation and Research Center for the Giant Panda, Wolong...

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) Gongzhu licking her vulva and eating afterbirth after giving birth, common postpartum behavior, China Conservation and Research Center for the Giant Panda, Wolong...

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) keeper Gao Qiang sprays disinfectant on straw mats for Lei Lei's bedroom in preparation for her possible birthing, China Conservation and Research Center for the G...