Otherwise conservatives can fight against the Endangered Species Act on the grounds that once a species goes on it will never come off. A species or subspecies (regional population of the species in question) can be put back on the list at any time if their populations decline below the federal thresholds, or if the fed. doesn't like a state's management plan (provided we elect sensible administrations that let the science agencies do their jobs).
Let me say that personally I think every wolf is precious, but I also know that the reintroduction to Yellowstone would not even have been possible if the population had not been designated as experimental (thus subject to lethal control in cases of livestock kills). I gave money to Defenders of Wildlife because them putting their money where their mouth is on compensating ranchers went a long way toward settling local opposition to the Yellowstone reintroduction.
I've never heard of that particular conservation group (I have an M.S. in ecology so I'm aware of many conservation groups). Their statistics and positions don't sound like what I've heard from the International Wolf Center or Defenders of Wildlife over the years. Wolves recolonized Idaho and Montana naturally from Canada, and my understanding a few years ago was that you could no longer say the Idaho/Montana and Yellowstone populations were separate, since wolves range over hundreds of miles. I haven't followed things as closely the last couple of years because I moved from Minnesota (the other wolf area in lower 48) where I could go to meetings on wolf conservation easily, and I fell on tough times financially and my memberships to IWC and DoW lapsed.
I'm much more concerned about other species that need to be on the ESA list but are not, or who are on the list but little is being done to help them and they may go extinct in the next couple of decades.
My two cents anyway. Here are takes from FWS and Dow on it:
http://www.wolf.org/wolves/news/live_news_detail.asp?id=2930FWS press release on IWC site, in part:
“The wolf population in the Northern Rockies has far exceeded its recovery
goal and continues to expand its size and range. States, tribes,
conservation groups, federal agencies and citizens of both regions can be
proud of their roles in this remarkable conservation success story,” said
Scarlett, noting that there are currently more than 1,500 wolves and at
least 100 breeding pairs in Montana, Idaho, and Wyoming.
Service-approved state management plans will provide a secure future for
the wolf population once Endangered Species Act protections are removed and
the states assume full management of wolf populations within their borders.
The northern Rocky Mountain DPS includes all of Montana, Idaho and Wyoming,
as well as the eastern one-third of Washington and Oregon, and a small part
of north-central Utah.
“With hundreds of trained professional managers, educators, wardens and
biologists, state wildlife agencies have strong working relationships with
local landowners and the ability to manage wolves for the long-term,” said
Lyle Laverty, Assistant Secretary for Fish and Wildlife and Parks. “We’re
confident the wolf has a secure future in the northern Rocky Mountains and
look forward to continuing to work closely with the states as we monitor
the wolf population for the next five years.”
The minimum recovery goal for wolves in the northern Rocky Mountains was
set at a minimum of 30 breeding pairs (a breeding pair represents a
successfully reproducing wolf pack) and a minimum of 300 individual wolves
for at least three consecutive years. This goal was achieved in 2002, and
the wolf population has expanded in size and range every year since.
“These wolves have shown an impressive ability to breed and expand – they
just needed an opportunity to establish themselves in the Rockies. The
Service and its partners provided that opportunity, and now it’s time to
integrate wolves into the states’ overall wildlife management efforts,”
said Service Director H. Dale Hall.
Gray wolves were previously listed as endangered in the lower 48 states,
except in Minnesota, where they were listed as threatened. The wolf
population in the western Great Lakes was delisted in early 2007. When the
delisting of the Rocky Mountain population takes effect 30 days from its
publication in the Federal Register on February 27th, the Service will
oversee the only remaining gray wolf recovery program, for the southwestern
U.S. wolf population. The delisting announced today affects only the
northern Rocky Mountain population of gray wolves. Gray wolves found
outside of the Rocky Mountain and Midwest recovery areas, including the
southwest wolf population, remain protected under the Endangered Species
Act and are not affected by actions taken today.
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http://www.defenders.org/newsroom/press_releases_folder/2008/02_21_2008_wolves_lose_protection_under_endangered_species_act.phpin part:
The removal of federal protections for the gray wolf puts its continued survival in the northern Rockies at the mercy of the woefully insufficient state management plans developed by Wyoming, Idaho and—to a lesser extent—Montana. These plans call for dramatic reductions in wolf populations in the region.
“We will support delisting of the northern Rockies wolf when the states establish sustainable management plans that ensure viable, interconnected wolf populations throughout the region,” said Rodger Schlickeisen, president of Defenders of Wildlife. “Unfortunately, the current state plans seem designed to lead only to the dramatic decline and need for quick relisting of the wolf. That’s not in anyone’s best interest.”
Before a species can be delisted, FWS must determine that it does not face continued threats that could undermine the species’ survival. This criterion is not met under the state management plans which ignore scientific estimates that, for species to remain viable, there should be several thousand individuals, and wolf populations in the northern Rockies must be interconnected with larger wolf populations in Canada. With no federal protections in place, existing state management plans would permit wolf populations in the northern Rockies to be drastically reduced by as much as 70 percent, and eliminate any likelihood of establishing connections with Canadian wolf populations or promoting the establishment of wolf populations in other states such as Oregon, Washington, Utah, and Colorado.
edit to add article by L. David Mech, world's top wolf scientist:
The Challenge and Opportunity of Recovering Wolf Populations
http://www.wolf.org/wolves/learn/wow/regions/United_States_Subpages/ERecoveryandManagement1.asp