I'm not really "implying" HSUS IS Peta (though some organizations are being found out to be fronts for Peta) but there are ties. All you have to do is a search on the net about HSUS and Peta and you will begin to find many ties between the two.

This link is where I first read about in particular about the ties between the two: http://www.arbreptiles.com/extremists.html

It's pretty disturbing to read about the salaries and fund allocations of them. This quote in particular brings to light some facts that has to make one wonder:

HSUS ties with PeTA

The HSUS employs several former PeTA employees, and Ingrid Newkirk, president and founder of PeTA has allies within the HSUS directors. One of Newkirk's allies would be Wayne Pacelle, vice president for media and government affairs. Pacelle was hired by the HSUS directly from Cleveland Amory's Fund for Animals. Amory is also interestingly the mentor of PeTA co-founder Alex Pacheco.Newkirk used the help of Amory in 1987 when she seized corporate and financial control of the anti-research New England Anti-Vivisection Society and its multi-million dollar bank account, the first of her moves to consolidate the animal movement under her influence.

Other former PeTA employees and associates who are now employed at HSUS include the chief computer programmer, the head of its national and international investigations who by the way, also oversees its lucrative Wildlife Lands Trust, two key HSUS investigators and many other people throughout the HSUS corporate structure, including its lab animal section, which handles the medical research issue.
A key thing to note about HSUS is: They do not run any shelters and are in no way associated with local Humane Societies and get most of their funding from their similar name, because people think that they are funding animal shelters and adoption programs. HSUS and PETA have been shown to have distributed false and/or misleading information.

The following link shows all the organizations that the HSUS has connections with, including PETA. http://www.activistcash.com/org_conn...cfm?ORG_ID=136

I found that link to be tremendously educational. It seems to be widely conjectured that the HSUS uses a bit more subtle and different tactics in order to raise funds for the same things that Peta does.

I admit when I first saw HSUS literature I too was fooled by the term "Humane Society" thinking that their funds went out to humane society programs, but they do not, and that is what I think people should be aware of if they are donating to them.

This article also explains how HSUS uses its funds, how it misleads people, and its ties, again, to Peta:
http://www.orlanelhasa.org/hsus.htm

There are many, many more articles about all of this. All one has to do to research more is do an internet search on PETA and HSUS. It's quite an eye opener.