In what would be a milestone for the California condor recovery program, biologists believe a pair of the large birds has hatched a chick high in the cliffs of Zion National Park.

The moose population at Voyageurs National Park in Minnesota seems to be holding its own, according to a recent survey conducted by park biologists. While the herd isn't growning, moose mortality rates in Voyageurs are about half of that found elsewhere in northeastern Minnesota, officials say.

Yosemite National Park, one of the most-visited parks in the system, likely will be even busier this year as attention is drawn to the 150th anniversary of the Yosemite Grant that set aside the landscape for protection and which was a prelude to the idea of creating "national parks." As a result, park officials have some tips you might consider for avoiding the crowds as much as possible when you visit Yosemite.

Dogwood. Black Gum. Sassafras. These are just some of the native species seedlings that have been spotted in the forests of Valley Forge National Historical Park, where a significant reduction in the white-tailed deer herds has allowed these trees to recover from overbrowsing.