A single source? That would be a volume of such unwieldy size
that it would be less than useful, not to mention out of date
before it was published.

The genuinely concerned individual should be willing to put in
the time to collect resource for themselves.

Let me start your list:

http://eelink.net/EndSpp/
http://www.oregoncoast.com/Linkeco.htm
http://216.65.147.68/index.tcl
http://www.im.nbs.gov/amphibs.html
http://www.nmfs.gov/salmon/salmon.html

And for your reading list:
Adams, Douglas & Mark Carwardine.1990 Last Chance to See. Harmony Books, NY
Gould, Stephen J. 1989.Wonderful Life.W.W. Norton Co., NY
Raup, D.M. 1991. Extinction:Bad Genes or Bad Luck? W.W.Norton & Co.
Terborough, John. 1989. Where have all the Birds Gone? Princeton U. Press.

HuhShih at aol.com wrote:
>
> My point? It would be nice if there was one or two authoratative sources one
> could go to that would give people the necessary information they need to
> make an informed decision concerning the environment. As it stands now we
> have none, only a tower of Bable of those trying to prove that we are either
> on the verge of extinction vs. those who say things have never been better.

--
Mike Patterson Alas, to wear the mantle of Galileo,
Astoria, OR it is not enough to be persecuted
celata at pacifier.com by an unkind establishment,
you must also be right.
---Robert Park
http://www.pacifier.com/~mpatters/bird/bird.html