Thanks, Laurent!
... and sorry for my somewhat tardy response (it's rather hard to keep up with all the latest additions, in various threads, caused by Martin's recent frenzy, in a multitude of threads and topics ... even if ever so welcomed)
However, it sure looks like James 'Jim' Levy is the Brother I was looking for ... I just couldn't, didn't find (or simply missed) him. The only sibling I found (earlier) was his sister. Thereby my (somewhat unwarranted) scepticism.
Though, I presumed this would be the case. We've surely seen cases of namesakes before, but even two Seymour Harry Levy, with similar years, was almost too good to be true. Both born in July, in the early 1920's (only one year apart), both died in February 2013. That there, on top of those two, would have been a third Seymour H. Levy, in about the same Era, seemed a bit too far-fetched, or (to say the least) highly unlikely. But, you know ... one has to check all the bits and pieces, whatever gnawing fact, as far as possible, until it make sense (at least until one feel convinced enough, just to drop it).
Either way; no wonder the
Eponym Dictionary ... (2014) got them confused. From what I've seen, I don't think "our guy", Seymour Harry Levy, ever lived in Indiana. Looks like he's stayed in Arizona (that is after having arrived there, of course). And his younger brother 'Jim' could possibly still be there, in Arizona. At least he was there in April 2014.
See the following quotes (and links):
Gallizioli, S., S. Levy, and J. Levy. 1967. Can the masked bobwhite be saved from extinction? Audubon Field Notes 2:571-575.
[...]
Jim Levy, Retired (“re-discoverer” of the masked bobwhite and naturalist), Tucson, AZ
[from
here, pp. 33 & 36]
Levy, S. H., and J. J. Levy. 1984. Report of a brief reconnaissance of the Buenos Aires Ranch during August 1982 and 1983 in search of the Masked Bobwhite. Report to the U. S. Fish and Wildlife Service, Albuquerque, NM.
[ditto
here, unpaginated, but in alphabetical order.]
For or Jim and Seymour Levy, it had been a disastrous week. Tattered and torn, the Tucson ornithologists had followed rumors and hearsay into some of the wildest backcountry of the Mexican state of Sonora. Their mission: to locate a last remnant population of North America's rarest quail. ...
[
here, pp.32–37, or see
attached excerpt]
Also see
this Thesis, by Richard A. Bishop (1964):
THE MEARNS QUAIL (CYRTONYX MONTEZUMAE MEARNSI) IN SOUTHERN ARIZONA
[...]
I wish to express my gratitude to James and Seymour Levy, who initiated the interest and helped gain financial support for this study, for their field assistance and constant help throughout the project.
[in ACKNOWLEDGEMENTS, on p.iv]
Seymour and James Levy, Tucson taxidermists, observed large numbers of birds in the Santa Rita Mountains during 1956.
[on p.50]
And
this: Overview of the Endangered Species Program, by Glen Smart [in; Perry, M.C. (Ed.), 2016, The history of Patuxent—America’s wildlife research story: U.S. Geological Survey Circular 1422]:
... we received the first bobwhites from two brothers in Tucson, Jim and Seymour Levy. They had been studying the birds on their own, and had a few birds in captivity. ...
[on p.144]
Well, ... there he was, and is, confirming the relationship/brotherhood betwenn James 'Jim' Levy, and his older Brother Seymour H. Levy ("our guy"), thus: at last we've got him, and them; "it's a wrap"!
Thus and thereby; ...
levyi as in:
• the invalid (Willow) Veery (Trush) ssp. "
Catharus fuscescens levyi"* PHILLIPS
1991 (
i.e.
not "1986" as I erroneously, and somewhat sloppy, wrote it, back in 2013, in #5, ... sorry about that)
= the US Ornithologist, Zoologist, Taxidermist and Conservationist
Seymour Harry Levy (
1923–2013), in short; born on 12 July 1923, in Chicago, Illinois, and onwards (as already told, or shown) ... until he died 28 February 2013, in Tucson, Arizona.
And; thanks again Laurent, for finding the proper years (of both Birth and Death), as well as the true identity of "our" Mr. Seymour H. Levy. 🎖️
If I at times appear too sceptical, and slightly over-suspicious, in cases like this (and other, like the recent Dodson case), I'd say it's just a result of having spent High School in a Class with four guys by the name Mikael (two Mikael Johansson, one Mikael Johnsson, and one Mikael Pettersson). After such an experience misleading names, and mix-ups, simply becomes part of one's system. 🙄
And, .... just to confuse things;
here (in April 2014), the same old guy (well in his 90's) is called "John" Levy (in the Photo by-line), standing by the Camp fire, telling the AZFO audience memories about the caracaras (in Arizona), of when he; " ... with his brother Seymour, discovered the first Crested Caracara nest in the state in 1960". Though note that he's; "Jim Levy", in the note of "thanks ...", at the very end of the same Survey report.
As there is a chance that 'Jim' might still be alive, let's not search for his dates of Birth (due to the risk of Identity theft). I think we can just leave him there. By the campfire ... and remember that he himself hasn't been commemorated in any bird (at least not as far as I know). The only reason why I wanted to find him (as well), was to pin-point his older brother Seymour, and to put both of them in context (and as such, to exclude any other possible, even if highly unlikely, namesakes). Nothing else.
However, that we've done, theryby; case closed (at least on my part).
Thanks also to Martin for finding the missing "H." (Harry) part, making it possible to find the correct "our guy"!
levyi (and the Levy Brothers) ... over and out.
Björn
____________________________________________________________________________________________________________________________________
*as far as I can tell, it ought to be a synonym of today's ssp. Catharus fuscescens salicicola (Ridgway, 1882),
a k a Hylocichla/Turdus fuscescens salicicolus. 
