North, a Little Penguin, is pushed into the sea by veterinarian Amy Twentyman of the Taronga Zoo at North Curl Curl beach in Sydney March 20, 2009. The zoo released back into the ocean two adult Little Penguins after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT) 

North, a Little Penguin, is pushed into the sea by veterinarian Amy Twentyman of the Taronga Zoo at North Curl Curl beach in Sydney March 20, 2009. The zoo released back into the ocean two adult Little Penguins after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT) 

Two Little Penguins, named South (L) and North, are carried before being released into the open ocean by veterinarian Amy Twentyman of the Taronga Zoo at North Curl Curl beach in Sydney March 20, 2009. The zoo released back into the ocean the two adults after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT) 

North, a Little Penguin, is released into the sea by veterinarian Amy Twentyman of the Taronga Zoo at North Curl Curl beach in Sydney March 20, 2009. The zoo released back into the ocean two adult Little Penguins after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT) 

South, a Little Penguin, makes its way into the sea after being released at North Curl Curl beach in Sydney March 20, 2009. Sydney's Taronga Zoo released back into the ocean two adult Little Penguins after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT) 

Two penguins named South (L) and North are released to the open ocean by veterinarian Amy Twentyman of the Taronga Zoo at North Curl Curl beach in Sydney March 20, 2009. The zoo released back into the ocean the two adults after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT SOCIETY) 

North, a Little Penguin, walks into the water after being released at North Curl Curl beach in Sydney March 20, 2009. Sydney's Taronga Zoo released back into the ocean two adult Little Penguins after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA)
ANIMALS ENVIRONMENT) 

North, a Little Penguin, makes its way into the sea after being released at North Curl Curl beach in Sydney March 20, 2009. Sydney's Taronga Zoo released back into the ocean two adult Little Penguins after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT) 

North, a Little Penguin, looks back as it is pushed into the sea by veterinarian Amy Twentyman of the Taronga Zoo at North Curl Curl beach in Sydney March 20, 2009. The zoo released back into the ocean two adult Little Penguins after they had rested and been cared for at Taronga's Wildlife hospital. REUTERS/Daniel Munoz (AUSTRALIA ANIMALS ENVIRONMENT IMAGE OF THE DAY TOP PICTURE)