Search found 170 matches

by Robert Hansen
March 16th, 2017, 4:56 pm
Forum: The Forum
Topic: Phrynosoma in Kern Co
Replies: 11
Views: 2858

Re: Phrynosoma in Kern Co

Unless somebody released a coastal, none naturally occur at the DTNA. The lowest I have seen coastals on the desert slopes is the southern flank of the Tehachapis, where they occur in a mixed shrub/Joshua Tree community. There are no known instances where blainvillii and platyrhinos occur together, ...
by Robert Hansen
May 8th, 2016, 5:30 pm
Forum: The Forum
Topic: Need Expert Opinion On Panamint Rattlesnake ID
Replies: 56
Views: 14420

Re: Need Expert Opinion On Panamint Rattlesnake ID

That is a Panamint, based on color of tail rings. The body pattern also says stephensi, and that snake looks typical for southern stephensi pops.
by Robert Hansen
December 18th, 2015, 6:25 pm
Forum: FHF Image Lab
Topic: Nikon 14-24 2.8 anyone??????
Replies: 2
Views: 2862

Re: Nikon 14-24 2.8 anyone??????

Hey guys, I was wondering if anyone here has any feedback or experience with the Nikon 14-24 2.8 Everything out there says that its INSANELY sharp. That being said, as I am sure you guys know the lens cost a lot of money. I really like using a wide-angle for wildlife photography and am interesting ...
by Robert Hansen
September 17th, 2015, 2:22 pm
Forum: The Forum
Topic: new invasives
Replies: 7
Views: 2046

Re: new invasives

Link here to paper concerning Northwestern Salamanders and Christmas Trees.

http://digitalcommons.unl.edu/biosciherpetology/15/
by Robert Hansen
July 16th, 2015, 7:46 am
Forum: The Forum
Topic: Gartersnake (cyrtopsis) behavior - Rhabdophis impersonation
Replies: 41
Views: 7853

Re: Gartersnake (cyrtopsis) behavior - Rhabdophis impersonat

Great observation...never seen this before in any Thamnophis. Makes you wonder if they're sequestering bufotoxins. This should be published as a natural history note.
by Robert Hansen
September 16th, 2014, 7:07 pm
Forum: Reading Room
Topic: Zenscientist Registration
Replies: 5
Views: 3543

Re: Zenscientist Registration

An EndNote file of the contents of Herpetological Review is now available on ZenScientist.com. This will be of great use to anyone looking to publish a geographic distribution note or a natural history note. Also SSAR has decided to make all but the last five years of Herpetological Review availabl...
by Robert Hansen
September 15th, 2014, 7:59 pm
Forum: Reading Room
Topic: Zenscientist Registration
Replies: 5
Views: 3543

Re: Zenscientist Registration

An EndNote file of the contents of Herpetological Review is now available on ZenScientist.com. This will be of great use to anyone looking to publish a geographic distribution note or a natural history note. Also SSAR has decided to make all but the last five years of Herpetological Review available...
by Robert Hansen
July 1st, 2014, 9:09 pm
Forum: The Forum
Topic: New species of rattlesnakes: Crotalus tlaloci & C. campbelli
Replies: 11
Views: 4480

Re: New species of rattlesnakes: Crotalus tlaloci & C. campb

justinm wrote:Thanks Chris, I found a link but I don't have a subscription that will allow me to read the abstract. Maybe someone can help out?

http://biotaxa.org/Zootaxa/article/view ... .3826.3.34
PM me with an email address if you need a copy of the paper.
by Robert Hansen
June 15th, 2014, 9:52 pm
Forum: The Forum
Topic: Where can I get a John Zegel snake hook?
Replies: 6
Views: 1429

Re: Where can I get a John Zegel snake hook?

Sent you an email address via PM...hope that works.
by Robert Hansen
May 29th, 2014, 10:26 pm
Forum: The Forum
Topic: Needing help
Replies: 28
Views: 4593

Re: Needing help

Jim: thanks for any forthcoming info. As for your desert phase helleri , I really don't have much experience with that area but would be really surprised if helleri naturally occurred near Indio. That's some serious low, hot desert, lacking any major drainages or other corridors that would allow ani...
by Robert Hansen
May 29th, 2014, 12:49 pm
Forum: The Forum
Topic: Needing help
Replies: 28
Views: 4593

Re: Needing help

Jim:

Yes, it would be nice to have info on your lateralis record. You can email me at [email protected].

Thanks.
by Robert Hansen
May 28th, 2014, 5:15 pm
Forum: The Forum
Topic: Needing help
Replies: 28
Views: 4593

Re: Needing help

Robert Hess: Your snakes are correctly ID'd as lateralis , and at the elevation you found them, you are well below the lowest elevation for taeniatus in that area. Carl: Your snake is also correctly ID'd as lateralis . Here are some pics of both species from just a few miles apart. Aside from the ob...
by Robert Hansen
May 27th, 2014, 6:15 pm
Forum: The Forum
Topic: Needing help
Replies: 28
Views: 4593

Re: Needing help

The first taeniatus was found on the Kern Plateau by me in 1982, and lateralis has been known from there prior to that. Mostly, taeniatus occurs at higher elevations (6000 to > 7000 ft elev) in pinyon-juniper-Jeffrey pine communities, with lateralis occupying lower elevations, sometimes in those sam...
by Robert Hansen
March 22nd, 2014, 4:36 am
Forum: The Forum
Topic: Hydromantes question
Replies: 1
Views: 587

Re: Hydromantes question

Is it worth looking for these guys in late July, or should I just forget about it? I know it is probably the worst time, but that is when I'll be in CA. H. shastae and brunus are low-elevation species with winter/early spring activity windows. H. platycephalus occurs at high elevation and can gener...
by Robert Hansen
September 3rd, 2013, 8:04 pm
Forum: The Forum
Topic: Rim Fire Progress Report (great site w/ maps)
Replies: 3
Views: 623

Re: Rim Fire Progress Report (great site w/ maps)

Fieldnotes wrote:I'm sure it has burned, perhaps even imporved some people's herp spots, cause its about to reach one of my favorite Yosemite sites near Hwy 120/.
A well-studied Ensatina hybrid zone has been destroyed.
by Robert Hansen
August 17th, 2013, 7:50 pm
Forum: The Forum
Topic: Columbia Spotted Frog Surveys
Replies: 7
Views: 2465

Re: Columbia Spotted Frog Surveys

Great report, Zach. Nice pics, too. Which population segment did you survey...the southernmost one?
by Robert Hansen
August 5th, 2013, 9:50 pm
Forum: The Forum
Topic: List of Herpetological events: symposiums, conferences, etc?
Replies: 5
Views: 1328

Re: List of Herpetological events: symposiums, conferences,

To my knowledge, there is not a single location for this information. However, Herp Review publishes a list in each issue, and I've copied that information below. 22–27 August 2013—SEH 17th European Congress of Herpetology, Veszprém, Hungary. Information: http://seh2013.org/ 13–15 September 2013—6th...
by Robert Hansen
July 1st, 2013, 7:37 pm
Forum: FHF Image Lab
Topic: Recommendations for a field-worthy point-and-shoot?
Replies: 4
Views: 2283

Re: Recommendations for a field-worthy point-and-shoot?

Thanks for all of the recommendations and testimonials. Jason, nice stephensi!
by Robert Hansen
June 30th, 2013, 5:42 pm
Forum: FHF Image Lab
Topic: Recommendations for a field-worthy point-and-shoot?
Replies: 4
Views: 2283

Recommendations for a field-worthy point-and-shoot?

Not for me, but a young friend wanting to have something for the field capable of taking decent herp shots. He does not know an f-stop from ISO, so please don't suggest he go the DSLR route :) I don't keep up with reviews on P&S cameras, so really have no idea what the best options are. Recommendati...
by Robert Hansen
June 23rd, 2013, 8:51 pm
Forum: The Forum
Topic: Herps of the Gabes and Berdoos
Replies: 51
Views: 11668

Re: Herps of the Gabes and Berdoos

The absence of some stuff in the San Gabriels might be the result of climatic warming/drying cycles during the Pleistocene. Here's a possibly related example. In northern Baja California, you've got two significant mountain ranges: the Sierra Juarez and the more massive Sierra San Pedro Mártir. Sage...
by Robert Hansen
June 1st, 2013, 7:37 pm
Forum: The Forum
Topic: Garter ID
Replies: 9
Views: 1015

Re: Garter ID

Cool find. I'd love to know precisely where they found this snake. T. s. fitchi does indeed routinely occur at much higher elevations in the northern Sierra than is the case in the central and southern Sierra, for reasons that escape me. If you have the locality info and feel like sharing (beyond wh...
by Robert Hansen
May 1st, 2013, 10:02 pm
Forum: FHF Image Lab
Topic: image I liked the results of, opinions welcome!
Replies: 8
Views: 3464

Re: image I liked the results of, opinions welcome!

Neat idea...especially using a "night" snake. One thing that does not quite work for me is that the angle of illumination makes it clear that the moon is not the source. Possibly one way to address this is to position an off-camera flash above and to the left of the snake to mirror the general angle...
by Robert Hansen
April 23rd, 2013, 10:12 pm
Forum: The Forum
Topic: Diadophis tail defense
Replies: 4
Views: 1060

Re: Diadophis tail defense

This is an example of aposematic (warning) coloration that strongly contrasts with the rather drab dorsal color of ringneck snakes, potentially creating a startle effect in a predator. If this momentarily halts a predation attempt, this might allow the snake to escape. Then throw in some nasty musk ...
by Robert Hansen
April 15th, 2013, 10:05 pm
Forum: Herpetoculture Forum
Topic: Acrantophis Appreciation
Replies: 18
Views: 8171

Re: Acrantophis Appreciation

... i for one am just blownaway by the fact theres boas in madagascar period, how strange & unlikely is that? Its even more unlikely than a python in mexico, but i guess theres one there too. Yet somehow the entire freaken new world couldn't come up w/ a single decent dang monitor (sans gilas) nor ...
by Robert Hansen
April 4th, 2013, 6:50 pm
Forum: The Forum
Topic: Mexican Reptile Books (Southern Region)
Replies: 11
Views: 3938

Re: Mexican Reptile Books (Southern Region)

In addition to Matt's list, Julio's book on SLP is also in the works.
by Robert Hansen
March 23rd, 2013, 9:29 pm
Forum: The Forum
Topic: CA frog I.D
Replies: 7
Views: 1060

Re: CA frog I.D

You are right on the money. Foothill Yellow-legged Frog (Rana boylii), and a nicely patterned one at that. What elevation were you finding these?
by Robert Hansen
March 20th, 2013, 5:38 am
Forum: The Forum
Topic: Field guides for Mexico?
Replies: 4
Views: 956

Re: Field guides for Mexico?

There are 3 books that come to mind that fit the bill. Two are travel-friendly, the third is a larger reference work, now out of print and rather pricey. Jon Campbell's "Amphibians and Reptiles of Northern Guatemala, the Yucatán, and Belize" http://www.amazon.com/Amphibians-Reptiles-Northern-Guatema...
by Robert Hansen
March 19th, 2013, 8:26 pm
Forum: The Forum
Topic: Field guides for Mexico?
Replies: 4
Views: 956

Re: Field guides for Mexico?

Nothing yet for the whole country (though one is in the works), but there are a number of modern regional works that cover Aguascalientes, Baja California, Chihuahua, Coahuila, Querétaro, Hidalgo, with one for San Luis Potosí due soon, as well as quite a few regional works. Is there a particular reg...
by Robert Hansen
March 13th, 2013, 7:31 pm
Forum: The Forum
Topic: Rana draytonii in Nevada
Replies: 8
Views: 1373

Re: Rana draytonii in Nevada

http://www.fototime.com/B36386B04AF6E44/standard.jpg Rana draytonii was introduced to multiple localities in Nevada in the 1930s, with stock apparently derived from SF Bay Area populations. This fact was somehow overlooked much later, when a manuscript was developed (but never published) to describ...
by Robert Hansen
February 19th, 2013, 11:53 am
Forum: Board Line
Topic: For Discussion--the Future of Herp Organizations
Replies: 197
Views: 62673

Re: For Discussion--the Future of Herp Organizations

I wish I knew the reasoning behind each state's laws. Some are wide-open, while their next-door neighbors are almost completely closed. I don't get it. For state's with bag-limits, CA is probably the worst. Sorry, a little off topic... From what I've seen, the short answer is, "It's totally conting...
by Robert Hansen
February 4th, 2013, 1:43 pm
Forum: The Forum
Topic: Nay for the Mojave?
Replies: 28
Views: 1886

Re: Nay for the Mojave?

Roger, thanks again Robert :) :thumb: To me all of the Coleonyx seem like they'd be especially vulnerable to transdermal water loss, but that is just my impression based on their soft, almost translucent looking, skin. Always hard for me to imagine such seemingly delicate looking creatures survivin...
by Robert Hansen
February 4th, 2013, 9:26 am
Forum: The Forum
Topic: Nay for the Mojave?
Replies: 28
Views: 1886

Re: Nay for the Mojave?

Thanks much Robert. Just the kind of informed response I was hoping for. No where do you suggest that moisture conservation by snakes during droughy years/cycles is a factor in their activity. Can I assume that you don't give much weight to that supposition? edit: Jim, your post hit before while I ...
by Robert Hansen
February 3rd, 2013, 10:23 pm
Forum: The Forum
Topic: Nay for the Mojave?
Replies: 28
Views: 1886

Re: Nay for the Mojave?

As most here know, the Mojave (at least the California portion) is a winter rainfall desert. Winter precip levels affect primary production--the germination of annual plants. In turn, this affects insects, rodents, birds, lizards, and things that feed on them. Data for snake populations are largely ...
by Robert Hansen
November 19th, 2012, 10:31 pm
Forum: The Forum
Topic: No records of Sonoran Desert Toads from Nevada?
Replies: 1
Views: 709

Re: No records of Sonoran Desert Toads from Nevada?

My sense is that their distribution closely tracks the portions of the Sonoran and Colorado deserts where summer monsoonal moisture is substantial with low levels of inter-annual variability. In other words, summer precip levels are high enough to create breeding habitat for a several-week period an...
by Robert Hansen
October 1st, 2012, 11:29 am
Forum: The Forum
Topic: Happy 100th birthday, Hobart Smith!
Replies: 10
Views: 2011

Re: Happy 100th birthday, Hobart Smith!

Video tribute to HMS, courtesy of Oscar Flores at UNAM.

http://www.youtube.com/watch?v=kC3VMWTDy5U
by Robert Hansen
September 27th, 2012, 2:53 pm
Forum: The Forum
Topic: Happy 100th birthday, Hobart Smith!
Replies: 10
Views: 2011

Re: Happy 100th birthday, Hobart Smith!

Hobart has been quite deaf for many years now, but communicates very capably via email. My last email exchange with him was a few months ago and he was quite lucid!
by Robert Hansen
August 18th, 2012, 9:58 pm
Forum: The Forum
Topic: Are you at the World Congress of Herpetology in Vancouver?
Replies: 19
Views: 4232

Re: Are you at the World Congress of Herpetology in Vancouve

A number of WCH pics have been posted on the Herp Review Facebook page, FYI.

https://www.facebook.com/pages/Herp-Rev ... 4018791286
by Robert Hansen
August 1st, 2012, 3:37 pm
Forum: The Forum
Topic: Putting Slender Salamanders in the NAHERP Database
Replies: 13
Views: 2148

Re: Putting Slender Salamanders in the NAHERP Database

Jonathan: Thanks for the compilation. I'd like to offer two points. The first is that NAFHA records are one piece of the data puzzle. The majority of specimens/locality data reside in museum collections. In looking only at NAFHA records, one can get a very misleading view of "data deficiency" or dis...
by Robert Hansen
July 6th, 2012, 12:22 pm
Forum: The Forum
Topic: Lampropeltis ID?
Replies: 8
Views: 1798

Re: Lampropeltis ID?

Most definitely ruthveni.

Cheers,

BH
by Robert Hansen
July 6th, 2012, 5:39 am
Forum: The Forum
Topic: Mojave Desert: Part 6
Replies: 9
Views: 2445

Re: Mojave Desert: Part 6

Superb post, Zach. Really impressive. Thanks.

Bob
by Robert Hansen
July 5th, 2012, 8:10 pm
Forum: The Forum
Topic: WW Bear / UFO post
Replies: 38
Views: 2584

Re: WW Bear / UFO post

Here's my "UFO" story. I was working a long-term desert canyon study site alone one summer moonless night. All of sudden a brightly lit object appeared in the very low western sky at what looked like the head of the canyon, just a few miles away. The light from this object got so bright that it illu...
by Robert Hansen
July 2nd, 2012, 12:29 pm
Forum: The Forum
Topic: Why do some of us not enter our data in naherp.com?
Replies: 134
Views: 12522

Re: Why do some of us not enter our data in naherp.com?

One of our members has seen several in the Bakersfield area, but has not submitted any of them to the database. This is one of our problems. Other than that, I cannot comment on the scarcity of CA glossies, as I haven't seen one in over 20 years, and haven't looked for them either. Brian: I am awar...
by Robert Hansen
July 2nd, 2012, 12:12 pm
Forum: The Forum
Topic: Why do some of us not enter our data in naherp.com?
Replies: 134
Views: 12522

Re: Why do some of us not enter our data in naherp.com?

Just a point of clarification about the status of "Glossy Snakes"...it's not all of them, but only the south-coastal/San Joaquin Valley subspecies, A. e. occidentalis . Those of us who have done field work for decades have noted a decline in this form, most obviously of course as a result of habitat...
by Robert Hansen
June 27th, 2012, 1:45 pm
Forum: The Forum
Topic: June issue of Herp Review
Replies: 2
Views: 1034

Re: June issue of Herp Review

RR:

Very funny! I think you "retired" as I recall. Rejection rate is still pretty good, ca. 50-60% for general articles and techniques mss., but lots of content coming our way. See you in Vancouver?

BH
by Robert Hansen
June 27th, 2012, 11:24 am
Forum: The Forum
Topic: Congrats to our VP, Rob Schell...
Replies: 10
Views: 2157

Re: Congrats to our VP, Rob Schell...

Very sweet pic, indeed. Congrats to Rob!
by Robert Hansen
June 27th, 2012, 11:18 am
Forum: The Forum
Topic: June issue of Herp Review
Replies: 2
Views: 1034

June issue of Herp Review

http://www.fototime.com/44945D406CFE062/standard.jpg Volume 43, number 2 (June 2012) is now online at ZenScientist.com, and will mail from the printer on 29 June. This is a special "World Congress of Herpetology" issue, to coincide with the 7th WCH in Vancouver in August. Contents include a "Histor...
by Robert Hansen
June 14th, 2012, 8:04 pm
Forum: The Forum
Topic: Gartersnake: Diablo, Coast or Both? (update)
Replies: 40
Views: 7720

Re: Gartersnake: Diablo, Coast or Both?

Brian: Actually, I earlier alerted Jeff Boundy to Owen's initial post, given that Jeff is the guy who published the description of Thamnophis atratus zaxanthus (Diablo Range Gartersnake) and knows the garter snakes of that region better than anyone. I think it's quite interesting that hybridization ...
by Robert Hansen
June 14th, 2012, 9:39 am
Forum: The Forum
Topic: Has any one have experience finding lyre snakes?
Replies: 98
Views: 6323

Re: Has any one have experience finding lyre snakes?

For those of us whose "formative years" in herping were pre-internet (waaaay before!), and even when herp field guides were marginal or non-existent, there was no alternative except trial and error. The amount of information (print and web-based) now available for most herps (at least in the U.S.) i...
by Robert Hansen
May 2nd, 2012, 6:51 am
Forum: The Forum
Topic: Illegal to collect?
Replies: 33
Views: 2515

Re: Illegal to collect?

I don't know why people reference the species of concern list for regulations? Is there some kind of new regulations I am unaware of or unable to find? Species of concern doesn't always equal uncollecatable unless something has changed. Fundad Brian: You are correct. SSC inclusion is largely irrele...
by Robert Hansen
May 2nd, 2012, 5:42 am
Forum: The Forum
Topic: Illegal to collect?
Replies: 33
Views: 2515

Re: Illegal to collect?

As noted, both Coast Range Newts (Monterey Co. southward) and Two-striped Gartersnakes are Special Concern Species and thus are hands off. Although neither enjoys any formal protected status, they have a zero bag limit. Some coastal drainage populations of Taricha are extremely small (on the order o...