A growing majority of bat species are in serious trouble, largely because of white nose syndrome, a deadly fungal disease that resembles a white fuzz on infected bats. As the disease has spread across the country, it's decimated bat populations – killing upwards of 99 percent of some populations – and turned up in many national parks. As part of the National Parks Traveler's Threatened and Endangered Species Project, contributing writer Kim O'Connell has been looking into the situation with bat species.

Big Bend National Park lately has drawn a lot of national attention, and not in a good way. Recently the U.S. Customs and Border Patrol announced that it wanted to build some sort of border wall along all or part of the 118 miles of border the national park shares with Mexico. Is that a good idea? Will it adversely impact the park? Can it even be done?

To discuss those and other questions, our guest today is Bob Krumenaker, whose long Park Service career included a stint as Big Bend's superintendent. Bob also is chair of the Keep Big Bend Wild organization that is pushing to see a large portion of the park designated as official wilderness.

To put some perspective on the National Parks Travelers' monthslong coverage of threatened and endangered species, we're going to go back in time a bit today to replay a podcast in which we discussed the ESA — and possible changes to it — with Jake Li, a vice president with Defenders of Wildlife, and Stephanie Adams, director of wildlife at the National Parks Conservation Association.

At Cumberland Island the National Park Service currently is crafting a visitor use management plan that critics say poses a great threat to the national seashore's official and potential wilderness.

To get an understanding of what's at risk, we've invited Jessica Howell-Edwards, the executive director of Wild Cumberland, which advocates for the seashore's wilderness area and ecosystems, to join us.

The Florida Reef stretches from Biscayne National Park south past Everglades National Park and down to Dry Tortugas National Park in Florida. It's roughly 350 miles long, and is the only coral reef in the continental United States.

When it comes to reefs around the world, the Florida Reef is the third largest. But, unfortunately, it's under a lot of pressure. It's dealing with pollution, ocean warming, damage inflicted by anchors, and disease. Perhaps the most serious disease infecting the reef is Stony Coral Tissue Loss Disease, which can be fatal to corals.

Our guest today is Beth Firchau, who works for the Association of Zoos and Aquariums. Part of her role is to manage the association's safe coral program, and part of her role is AZA's coordinator for the Florida Reef Tract Rescue Program. And part of her work involves a network of aquariums across the United States that are holding samples of corals from the Florida Reef.

Whitebark pines are a Western icon that the National Park Service has designated as a "vital sign" species because they are critical to ecosystem functions. But they are at risk of extinction due to climate change, beetles, and a fatal fungus from Eurasia.

Our guest today is Dr. Elizabeth Pansing, the director of forest and restoration science for American Forests, a nonprofit organization that strives to create healthy and resilient forests.

This program was made possible in part by the Park Foundation.

What is the fate of the critically endangered Kemp's Ridley Sea Turtle? This smallest of the sea turtle species glides among the sea grasses and coral reefs of the Gulf of Mexico, and nests predominantly along the shores of Mexico, with a growing number of turtles nesting on Padre Island National Seashore in Texas.

Hopes for this sea turtle's recovery weigh heavily on the national seashore's programs and budgeting, which are also threatened and endangered. Dr. Donna Shaver, one of the world's foremost sea turtle experts, nurtured the seashore's sea turtle science program for the past 22 years. However, for the past five years she's been battling to save the program, and her position, at Padre Island National Seashore.

National Park Service officials would not allow us to discuss the plight of the Kemp's Ridley Sea Turtle with Dr. Shaver. Instead, the Traveler's Lynn Riddick talks this week with research scientist Nathan Putman. He's involved in studies of the Kemp's Ridley to understand more about this intriguing species.

During a typical summer day at Yellowstone National Park roughly 3,000 vehicles enter through the North Entrance and head down to Mammoth Hot Springs so their passengers can begin their park adventure.

Up until June 2022 their route took them along the Gardner River. But that all changed on June 13, 2022, when a once-in-500-years rainstorm, falling on top of snow cover, sent waters rampaging down the Yellowstone, Lamar, and Gardner rivers.

Those flood waters took out sections of both the northeast and north entrance roads in the park. While the gaps in the Northeast Entrance Road were patched relatively quickly, the North Entrance Road through Gardiner Canyon remains closed to traffic. Instead, vehicles are temporarily using the Old Gardiner Road, a stagecoach route that was relatively quickly rehabilitated to handle vehicle traffic.

Since the flood, the National Park Service has been looking for a permanent route from Gardiner Montana, to Mammoth Hot Springs that would avoid going all the way through the Gardiner Canyon. Yellowstone Superintendent Cam Sholly joins us today to explain the decision-making that has gone into finding that route.

A dramatic battle is being waged on the flanks of Halealakā National Park to save rare Honeycreeper birds that exist only in Hawaii.

It's believed that the 50-odd known living or extinct species of honeycreepers all evolved from a single colonizing ancestor that arrived on Hawaii, the world's most remote island group, some three to five million years ago.

Threats to the birds began to surface around 500 A.D., when Polynesian colonists began to settle on the Pacific island chain. They began to clear most of the low elevation forests, inadvertently eating away at the birds' habitat. It's also thought that the Polynesians introduced the Pacific Rat to the islands, a predator that ate the birds' eggs. The arrival of Europeans in the late 18th century accelerated the destruction of the birds' forest habitat. Along with loss of habitat, the honeycreepers are falling victim to avian malaria, which is carried by mosquitoes, and which is almost always fatal to the birds. Today only 17 species of honeycreepers survive in the state, some with fewer than 500 birds remaining, and it's believed that many will be pushed to extinction within a decade if nothing is done.

In a bid to slow, if not reverse, the spread of avian malaria, the Maui Forest Bird Recovery Project is working to disrupt the reproduction of mosquitoes. Traveler associate editor Rita Beamish and Editor Kurt Repanshek recently sat down with Dr. Hanna Mounce, program director of the project, to learn about its work.

This year, 2025, likely will go down as the most transitional for the National Park Service. We've seen the loss of nearly a quarter of the permanent workforce, efforts to whitewash history in some parks, and the loss of a grand lodge to wildfire.

The past 12 months have been full of news impacting the National Park Service and national parks, not all of it good. It's been a somewhat tumultuous year, leaving many wondering what the new year will bring for the parks and their employees.

To help us look back over the past 12 months, we've invited Kristen Brengel, the senior vice president for government affairs at the National Parks Conservation Association, to join us.