Mercury's surface in "enhanced color," a color scheme created to emphasize color differences. This is not what Mercury would look like to the human eye, but by applying mathematical analysis to images, color differences can be accentuated beyond those visible to a person.
Mount Rushmore National Memorial under construction.
The workers had to endure conditions that varied from blazing hot to bitterly cold and windy. Each day they climbed 700 stairs to the top of the mountain to punch-in on the time clock. Then 3/8 inch thick steel cables lowered them over the front of the 500-foot face of the mountain in a "bosun chair." Despite the dangers, no one was killed during the project.
Otters in Glacier Bay National Park and Preserve, Alaska.
The sea otter population of Glacier Bay has increased dramatically in the past 20 years. Ecologists consider sea otters a keystone species here. Otters consume vast quantities of clams, urchins, crabs, and other invertebrates and their presence creates ripples through the ecosystem. NPS photo.
Every day someone like you becomes a wildland wildfire fighter, a teacher, a trail-builder, a museum curator, or a park ranger. Discover your opportunities in national parks. Come to play. Come to learn. Come to serve. Develop your environmental leadership skills. Find a job. Be the next generation to preserve and protect these great places.
With more than 80% of Americans living in urban areas, urban parks are more important than ever. The father of American landscape architecture, Frederick Law Olmsted, said of urban parks:
It is one great purpose of the Park to supply to the hundreds of thousands of tired workers, who have no opportunity to spend their summers in the country, a specimen of God's handiwork that shall be to them, inexpensively, what a month or two in the White Mountains or the Adirondacks is, at great cost, to those in easier circumstances.
Salazar Announces Successful Recovery of Lake Erie Watersnake
WASHINGTON — Secretary of the Interior Ken Salazar today announced that the U.S. Fish and Wildlife Service (the Service) removed the Lake Erie watersnake, a harmless species found on offshore islands in western Lake Erie in Ohio and Ontario, from the Federal List of Endangered and Threatened Wildlife. The snake becomes the 23rd species to be delisted due to recovery. Under the Endangered Species Act, the Service has worked to successfully stabilize our nation's most imperiled species in part by fostering partnerships, employing scientific excellence, and developing a workforce of conservation leaders who promote conservation programs that help species recovery.
“Today the Lake Erie watersnake joins species such as the bald eagle, the American alligator, and the peregrine falcon that have rebounded from the threat of extinction and no longer require the protection of the Endangered Species Act,” Salazar said. “These species — and the hundreds of others whose extinction has been prevented by the Act — are living testimonies to its ability to bring species back from the brink by protecting them and conserving and restoring their habitat.”
The Service listed the Lake Erie watersnake as a threatened species in 1999. Threats to the species included intentional killing and loss of its shoreline habitat on Lake Erie to development. In 2003, the Service finalized a recovery plan that called for protecting habitat and providing outreach to reduce threats to the species. In cooperation with the Ohio Department of Natural Resources Division of Wildlife (ODNR) and other partners, biologists worked to minimize and reduce the threats to the snake by sustaining and protecting summer and hibernation habitat and ensuring the permanent protection of shoreline habitat.
“As with most conservation success stories, the comeback of the Lake Erie watersnake is the result of different groups of people working toward a common goal. Partners — from local citizens to government agencies — worked hard to address threats to this species and ensure its long-term survival,” said Fish and Wildlife Service Director Dan Ashe.
Critical research, including an annual intensive Lake Erie watersnake census begun in 2001, provided data that identified when the species had achieved its population goal and threats to its survival had been reduced. In addition, public outreach programs provide awareness of the snake, its plight and its role in the ecosystem.
Recovery criteria include a combined population of at least 5,555 snakes on the U.S. islands, sustained for six years, and protection of key habitat.
Through continued habitat protection and public education, the Lake Erie watersnake population grew to about 11,980 in 2009, and has exceeded the minimum recovery level since 2002. About 300 acres of inland habitat and 11 miles of shoreline have been protected for the snake since it was listed.
Partners in the efforts to recover the Lake Erie watersnake include the ODNR, Northern Illinois University, Lake Erie Islands Chapter of the Black Swamp Conservancy, Western Reserve Land Conservancy, Put-in-Bay Township Park District, the Cleveland Museum of Natural History, and The Ohio State University Stone Laboratory.
The Act requires that a species be monitored for a minimum of 5 years after delisting to ensure that the species remains stable after its protections are removed. The Service and the ODNR have developed a post-delisting monitoring plan to verify that the species remains secure from risk of extinction after the protections of the Act no longer apply.
Lake Erie watersnakes remain listed as endangered by the state of Ohio so killing them is still illegal under state law.
Click here for a fact sheet on the Lake Erie watersnake.
The final rule will publish in the Federal Register on August 16, 2011, and become effective on September 15, 2011. A copy of the final rule and other information about the Lake Erie watersnake are available online at http://www.fws.gov/midwest/endangered/reptiles/lews/index.html or by contacting the Columbus Ohio Field Office at 4625 Morse Road, Suite 104, Columbus, Ohio 43230, or by telephone at 614-416-8993.
The Endangered Species Act provides a critical safety net for America's native fish, wildlife, and plants. The Service is working to actively engage conservation partners and the public in the search for improved and innovative ways to conserve and recover imperiled species. To learn more about the Endangered Species Program, visit http://www.fws.gov/endangered/.