Suzi Eszterhas / Sea Otter (Enhydra lutris) three week old orphaned pup holding caretaker finger, Alaska SeaLife Center, Seward, Alaska

Suzi Eszterhas / Sea Otter (Enhydra lutris) caretaker, Deanna Troeauga, bottle-feeding three week old orphaned pup, Alaska SeaLife Center, Seward, Alaska

Eric Baccega / Western lowland gorilla (Gorilla gorilla gorilla) reintroduction to Bateke Plateau National Park through Gorilla Protection Project. Transporting crate with female from Beauval Zoo onto second aircraf...

Eric Baccega / Western lowland gorilla (Gorilla gorilla gorilla) reintroduction to Bateke Plateau National Park through Gorilla Protection Project. Zookeeper from Beauval Zoo checking and comforting female in cage a...

Paul Souders/ Worldfoto / African Elephant (Loxodonta africana) orphaned calf bottle feeding, David Sheldrick Wildlife Trust, Nairobi, Kenya

Paul Souders/ Worldfoto / African Elephant (Loxodonta africana) orphaned calf bottle feeding, David Sheldrick Wildlife Trust, Nairobi, Kenya

Suzi Eszterhas / Common Wombat (Vombatus ursinus) five and a half month old joey bottle feeding, Bonorong Wildlife Sanctuary, Tasmania, Australia

Eric Baccega / Giant panda (Ailuropoda melanoleuca) pair mating, female Huan Huan and male Yuan Zi, watched by zookeeper, and Chinese scientist, 23rd March 2017. Female pandas enter estrous for only 48 hours in a...

Suzi Eszterhas / Harbor Seal (Phoca vitulina) orphaned pup and caretaker, Alaska SeaLife Center, Alaska

Suzi Eszterhas / Harbor Seal (Phoca vitulina) orphaned pup and caretakers, Alaska SeaLife Center, Alaska

Suzi Eszterhas / Snowy Egret (Egretta thula) caretaker, Nancy Teater, holding four week old chick, International Bird Rescue, Fairfield, California

Suzi Eszterhas / Great Egret (Ardea alba) caretaker, Isabel Luevano, examining one week old chick, International Bird Rescue, Fairfield, California