ALBUQUERQUE, N.M. -- President-elect Joe Biden has said there will not be another foot of wall constructed along the border between the U-S and Mexico when he takes office in January.

Bryan Bird with Defenders of Wildlife says that will be a change for the better for animal migration at the border and for intercontinental wildlife known to move back and forth from the U-S to Mexico in search of resources and habitat. He says the Trump administration hasn't built a lot of new border wall, but has instead replaced roughly 400 miles of vehicle barriers.

"They were able to replace a lot of vehicle barriers with impenetrable pedestrian barriers, which are terrible for wildlife," Bird asserted. "So, there has been enormous damage done to the border, especially in Arizona and New Mexico."

Bird says previous barriers were only about four-feet high, and animals could pass under or over them, but new wall is 30-feet tall.

The Trump administration argued the wall border was needed to stop illegal immigration. Biden has said he'll make sure sure border protection is in place, but rather than a wall, high-tech capacity will be used at ports of entry.

Bird believes activists who worked hard to prevent construction of the wall will now begin a "tear down the wall" campaign.

But he's also concerned much more of the wall could be built before next year's presidential Inauguration on Jan. 20.

"Customs and Border Protection is furiously working to complete the impenetrable wall across our southern border," Bird observed. "They're working day and night, regardless of the coronavirus, to finish it."

Bird is optimistic the incoming administration will consider taking down part of the wall, not only where it's having negative impacts on wildlife, but also where Native American cultural sites have been destroyed during the wall's construction.

While Trump promised Mexico would pay for the wall, it has not. Instead, U.S. taxpayers have paid $15 billion dollars so far.

The U.S. Fish and Wildlife Service announced it is considering a ban on lead ammunition on several national wildlife refuges, a move some wildlife advocates want to see replicated at the state level in Wisconsin.

Mark Naniot, director of wildlife rehabilitation for Rhinelander-based Wild Instincts, explained lead ammunition fractures into small particles when fired into an animal, which means lead-contaminated meat can then be consumed by hunters and scavengers.

"They ingest these tiny little lead particles, and all it takes is one or two almost microscopic particles to cause lead poisoning," Naniot noted.

Naniot explained Wisconsin's Conservation Congress, which acts as an advisory committee to the Department of Natural Resources, has voted on lead ammunition regulations in the past, although it has never approved such policies.

While there's no current ban, the Department of Natural Resources recommends against using lead-based ammunition and angling gear, citing concerns over lead poisoning.

Many hunters have embraced lead-free ammunition, but some counter it is more expensive than lead-based ammunition and less widely available. Naniot acknowledged the cost for a box of lead-free ammunition can be $10-$20 more, but argued it can take hunters years to go through a single box of ammunition.

"There's 20 shells in a box," Naniot pointed out. "And most people will shoot maybe one or two at a deer, maybe shoot a couple to make sure their gun is sighted in. So, you're shooting two or three [shells] a year. Well, that box is maybe going to last you maybe four or five years."

The U.S. Fish and Wildlife Service is accepting public comment on the proposed lead-ammunition ban until August 8. The rule would open up 19 federally-managed refuges to hunting, with the trade-off being lead ammunition would be banned on those lands. None of the refuges are located in Wisconsin.

A new study aims to reduce wildlife collisions in one of the biggest hotspots for them - Highway 395 from Reno, Nevada, through Tahoe up to Susanville.

The nonprofit Wildlands Network worked with specialists at Pathways for Wildlife to place about 40 cameras on the route - to see where animals are trying to cross and where specialized fencing is needed to direct them to culverts or a wildlife overpass.

Mari Galloway, California program manager with Wildlands Network, said the road cuts off the migration pattern for many different species.

"The mule deer, coyotes, pronghorn, elk, black bears, mountain lions," said Galloway. "American badgers, grey fox and long-tailed weasels occupy the area as well."

Many species overwinter in the lower elevations near Reno and migrate to the Sierra Nevadas in the summer in search of food, mates and new territory for the juveniles.

According to the University of California, Davis Roadkill Ecology Center, from 2016 to 2021 there were almost 350 large wildlife collisions - mostly mule deer - on a 60-mile stretch of Highway 395, doing more than $6 million in damage.

Tanya Diamond, co-owner and wildlife ecologist at Pathways for Wildlife, said the year-long study will identify existing passageways and fencing that could be improved or repaired, and the best place for a new wildlife overpass.

"In 15 years of study, I don't think I've ever encountered a highway that needed this much extensive help," said Diamond. "This is such an important area with the deer migrating like that."

The work builds on efforts from CalTrans and the California Department of Fish and Wildlife and their counterparts in Nevada. Actual construction of new culverts or overpasses is a few years off, once environmental studies are complete.

ALBUQUERQUE, N.M. -- Whether your pet is shy or outgoing, keeping them happy and healthy during the busy holidays can be a challenge.

Your curious cat might view a tree adorned with ornaments as a new toy, so make sure it's securely anchored. Dogs, on the other hand, like to chew on things and won't know seasonal plants such as evergreens and poinsettias are toxic.

Desiree Cawley, marketing manager for One Albuquerque Animal Welfare, said if guests are coming or parties planned, it's best to prepare much like pet owners do for the Fourth of July.

"Keep them in a bedroom, give them their favorite toy, have a TV going, so it muffles the sounds outside, so then they're not feeling overwhelmed when you have a lot of people in your house that they don't know," Cawley suggested.

Through Dec. 31, Albuquerque's Operation Silent Night is collecting financial donations along with small toys for cats and dogs including treats, beds, brushes, collars and other items for pets waiting to be adopted at the city's Animal Welfare Shelters.

In addition to taking it easy on scraps from the table, Cawley reminds pet owners to be mindful of what gifts are under the Christmas tree, especially if there is no indication as to what's inside.

"They may be cookies, they may be candy," Cawley pointed out. "And of course, dogs have a good sniffer, and so they might think that would be a good present to open for themselves."

Cawley also noted pets appreciate sticking to their routine as much as possible.

"And so when it gets changed, you have to be a little more understanding," Cawley urged. "Reassure them that everything is OK, and maybe love them a little extra."

If your pet will be boarded for the holidays, Cawley emphasized they might be overwhelmed by all the different smells in a kennel, and recommends bringing an item for them to snuggle.

"Make sure you give them the dog's blanket, favorite toy, their bed," Cawley recommended. "So they have that sense of smell, so if they have something like a security blanket kind of thing, would be ideal."