We don't need no stinking logic: If there weren't so damn many walruses out there, it might be easier to convince people that invisible gases are going to kill them all

U.S.. Denies Walrus Endangered Status for Now - NYTimes.com

“The threats to the walrus are very real,” Geoff Haskett, director of the Fish and Wildlife Service’s Alaska region, said on Tuesday.

But he added that the current size of the walrus population and the animal’s ability to shift to land during periods of heightened warming “make its immediate situation less dire than those facing other species such as the polar bear.”
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“The Obama administration has acknowledged that the walrus is facing extinction due to climate change, yet is withholding the very protections that can help save it,” Ms. Wolf said in a statement. “It’s like having a doctor declare that you are in critical condition, but then just leave you unattended in the hospital’s waiting room.”

The exact size of the Pacific walrus population is unknown, but a partial survey by American and Russian researchers in 2006 counted nearly 130,000.

Walrus: Habitat and Distribution

1. Total world walrus population is about 250,000 animals.
2. Pacific walrus population is more than 200,000 animals.
a. The Pacific walrus population has been hunted to depletion and allowed to recover several times.
b. After the latest population depletion, which began in the 1930s, Pacific walruses were given protection by Russia, the State of Alaska, and the U.S. federal government. This protection led to the eventual recovery of the Pacific walrus population (more than 200,000 animals). Walruses reoccupied areas where they had not been seen for several years.
c. By the early 1980s, walruses appeared leaner, they increased their consumption of alternate foods such as fishes, natural mortality increased, and birth rates decreased. This evidence supports the theory that the Pacific walrus population may have approached the carrying capacity of its environment.