Grey Whales are making a come back as birth rates rise after years of a depleting population.

Scientist blame the warming arctic waters, which are forcing the whales' prey further away and therefore harder to find. However, the whales may be using the warming conditions to their advantage--using breaks in the ice to find better routes to their prey, the fatty amphipod.

In 1999, 270 Grey Whales washed up on shore dead or dying from being severely malnourished. The warming weather has also reduced the number of their prey.

Researchers count the number of Grey Whale calves by counting the number of 3-month-old calves passing through Point Piedras Blancas near San Luis Obispo. Last year 945 passed through, which rose to 1,018 in 2006. Fewer than 300 were found in 2000 and 2001.