The hunting of gray wolves from Yellowstone National Park has set off alarm bells for wildlife-related businesses in the region.

Thirty businesses have sent a letter urging Interior Secretary Deb Haaland to return endangered-species protections to gray wolves.

Cara McGary, owner and lead guide of In Our Nature Guiding Services in Gardiner, said some wolves recently killed were from a pack she has been watching on her wildlife tours.

"They kind of went on a wander, and two of those puppies were killed just over the boundary of the park," McGary explained. "So it's frustrating from a business perspective as well as from kind of a personal perspective."

New laws in Montana and Idaho allow for the killing of 85% and 90%, respectively, of the states' wolf populations. Twenty wolves from Yellowstone have been killed in recent months, the most since the species was reintroduced 25 years ago, according to park officials. In September, federal officials said they would review whether protections should be restored for gray wolves.

Nathan Varley, a wildlife biologist and co-owner of the Gardiner-based Yellowstone Wolf Tracker, said he and other businesses have tried to convince Montana officials to reinstate hunting quotas near the park, which were limited because wolves are important for the tourism industry.

"This past year they just lifted those quotas," Varley pointed out. "That's allowed for this very high -- actually historic -- number of wolves being taken from what we consider to be park packs, the ones that we rely on."

Varley added he signed the letter to Haaland because of Montana's unresponsiveness to businesses' concerns.

McGary is a former U.S. Fish and Wildlife Service employee. She emphasized it is not her preference to have to go to the federal government to ask for endangered-species protections for gray wolves, noting it could erode the relationships built in the region.

"I'm disappointed that the state of Montana has made decisions that's put us in this place," McGary stated. "But we need intervention, so that's why I signed on personally."

Businesses near Yellowstone have organized the Wild Livelihoods Business Coalition to promote management practices allowing for coexistence with wildlife.

This week, in honor of World Otter Day, conservation groups are looking to raise awareness about efforts to restore sea otters along more areas of the California coast.

Right now, sea otter populations are mostly concentrated on the Central Coast, between Santa Barbara and an area just south of San Francisco, hemmed in by predatory white sharks.

Andy Johnson, California representative for Defenders of Wildlife, said they used to live all the way up the north coast.

"We'd like to, at some point, maybe shift some otters northward and get them into cooler waters, where sea otters used to be before they were hunted to near extinction," Johnson explained. "Let them maybe help restore some of the kelp along the north coast, and improve the biodiversity of those habitats."

The Monterey Bay Aquarium's surrogacy program has successfully reintroduced sea otters in nearby Elkhorn Slough.

The U.S. Fish and Wildlife Service is due to release a report to Congress this summer on the feasibility of expanding the program. Otters save kelp beds by eating sea urchins, which can devour the kelp if not kept in check.

Johnson noted the otter population has rebounded over the past century, but has a long way to go to fully recover.

"We think that there were between 16,000 and 20,000 otters historically on the California coast," Johnson reported. "Right now, there are about 3,000 animals. There were only about maybe 50 otters back in the early 1900s."

This week, the California State Assembly also passed a resolution to proclaim the 20th annual Sea Otter Awareness Week, which takes place Sep. 18-24.

The Colorado General Assembly has passed legislation to fund wildlife road-crossing projects across the state.

Rep. Julie McCluskie, D-Gunnison, said Senate Bill 151 has broad support from sportsmen and women, land and wildlife conservation groups, and community leaders from both parties. She argued safe passages work, and pointed to a successful program developed in Summit County.

"Our safe passages in Summit County have been able to reduce the number of wildlife and vehicle collisions by more than 92% in the five years since they were originally constructed," McCluskie reported.

Each year, wildlife-vehicle collisions kill thousands of animals, at a cost of more than $80 million in property damage and related expenses. The "Safe Crossings for Colorado Wildlife and Motorists" bill will use state funds to tap matching federal dollars for a list of shovel-ready projects, starting with stretches of roads and highways with high rates of wildlife-vehicle collisions.

Outdoor recreation contributes more than $62 billion to Colorado's economy. But Colorado Parks and Wildlife estimated more Western Slope mule deer does are killed each year in vehicle collisions than from hunting.

Rep. Perry Will, R-Carbondale, said the measure will help protect critical wildlife resources.

"We lose thousands of deer and elk and other wildlife across the state each year," Will noted. "This bill is important; that we can save those, plus the safety of the motoring public. There's some really bad accidents with wildlife and vehicle strikes on the roadways."

Colorado has been a leader in the West for wildlife-crossing solutions. There are currently 64 bridges, culverts or tunnels, and fencing projects to help move animals away from traffic and to safe crossings. McCluskie said the measure will help preserve Colorado's rich outdoor experiences.

"Nothing is more special about Colorado than our great outdoors," McCluskie stressed. "When we protect wildlife, we protect that very pristine, special, unique part of our entire state and culture."

Saturday is World Migratory Bird Day, and bird experts said it is a great time to be on the lookout for types of birds you may not see every day in your community.

Up to 300 species of birds have been identified in and around the Gulf of Maine during migration season, and this year's theme for the awareness day is the impact of light pollution on birds.

Nicholas Lund, advocacy and outreach manager for Maine Audubon, noted roughly one million birds die per day from running into glass. At night, the lights from within make glass invisible to birds, and during the day it reflects their habitat.

"Birds don't know what glass is," Lund explained. "They fly accidentally into windows when they are drawn in by lights, which also may disorient them as they're traveling or draw in the insects that they're trying to eat."

In addition to risks of collision, disorientation can cause birds to circle and deplete their energy resources, making them more vulnerable to predators.

Lund recommended turning out lights at night during migration, which is now through the first part of June, and then again in September and October. He said if you cannot keep your lights off, light fixtures can help, and you can treat the glass on your windows to make it more visible to birds.

Lund added while Saturday is the day selected to celebrate migratory birds, millions of birds are flying up to Maine every night from their wintering grounds in the south, looking for places to breed.

"The trees in your backyard are going to be full of colorful songbirds," Lund pointed out. "The shores and the mud flats will be full of shorebirds moving, the skies full with raptors. I mean, this is migratory bird month, for sure."

Lund emphasized for those who want some guidance, birders and experts are leading walks across the state - including at Fields Pond near Bangor on Saturday, as well as all this week and next at Evergreen Cemetery in Portland.

Also on Saturday, staff naturalist Doug Hitchcox will host a "Big Day," trying to find as many bird species as possible from Bangor to Kennebunkport.