rattlesnakes, 2010

December 9, 2010

More rattlesnakes, all from 2010:

great basin rattler, large adult, Onaqui Mtns

late April 2010, great basin rattler (Crotalus lutosus), large adult, Onaqui Mtns, Tooele Co, UT

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great basin rattler, subadult, Onaqui Mtns

early June 2010, great basin rattler (Crotalus lutosus), subadult, Onaqui Mtns, Tooele Co, UT

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great basin rattler, adult, Oquirrh Mtns

early June 2010, great basin rattler (Crotalus lutosus), adult, Oquirrh Mtns, Tooele Co, UT

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great basin rattlers, adult pair, South Snake Range

early Aug 2010, great basin rattlers (Crotalus lutosus), adult pair, South Snake Range, White Pine Co, NV

The larger snake here is a male that contains an implanted radiotransmitter, and was being tracked as part of a Snake Range rattler-tracking research study with which I volunteered.  Apparently, his implanted transmitter did not cause him to be too unattractive for this much smaller, grayish snake with him that was very probably a female.

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great basin rattler, large adult male, South Snake Range

early Aug 2010, great basin rattler (Crotalus lutosus), large adult male, South Snake Range, White Pine Co, NV

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habitat of great basin rattler, South Snake Range

early Aug 2010, habitat of great basin rattler (Crotalus lutosus), large adult male, South Snake Range, White Pine Co, NV

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great basin rattler, large adult male, South Snake Range

early Aug 2010, great basin rattler (Crotalus lutosus), large adult male, South Snake Range, White Pine Co, NV

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Different shot of same specimen as above:

great basin rattler, large adult male, South Snake Range

early Aug 2010, great basin rattler (Crotalus lutosus), large adult male, South Snake Range, White Pine Co, NV

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great basin rattler, small adult male, Pahvant Mtns

early Aug 2010, great basin rattler (Crotalus lutosus), small adult male, Pahvant Mtns, Millard Co, UT

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great basin rattler, large adult male, Pahvant Mtns

early Aug 2010, great basin rattler (Crotalus lutosus), large adult male, Pahvant Mtns, Millard Co, UT

These four specimens in the photos above are all adult males, which seem to comprise most of the rattlers seen out moving in August and September, as they search for females.

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habitat of great basin rattler, Pahvant Mtns

early Aug 2010, habitat of great basin rattler (Crotalus lutosus), large adult male, Pahvant Mtns, Millard Co, UT

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great basin rattler, adult female, South Snake Range

late Aug 2010, great basin rattler (Crotalus lutosus), adult female near tagged male, South Snake Range, White Pine Co, NV

The same transmitter-implanted adult male rattler in the early-August photo above in this post was, 4 weeks later, about 1 meter away from this brown rattler.  Radio-tracking him led me to her, too.  I could not easily photo him this time, due to where he was in the rockpile; but I obtained this quick shot of this nearby unimplanted probable-female, without causing her to move.  This one is another probable-female, and is definitely a different snake than the probable-female this male was with 4 weeks before, for this female is not as small and is browner-colored rather than gray.  These observations suggest the same adult male great basin rattler can court two different females during the same season.

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great basin rattler, large adult male, South Snake Range

early Sept 2010, great basin rattler (Crotalus lutosus), large adult male, South Snake Range, White Pine Co, NV

This is the whitest-background great basin rattler I have come across.

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habitat of great basin rattlers, South Snake Range

late Aug 2010, habitat of great basin rattlers (Crotalus lutosus), South Snake Range, White Pine Co, NV

That whitish specimen in the photo above was found downhill from this shot.  Up high on this slope near the tan patch of talus a radiotransmitter-implanted male was spending some time.  I pinpointed his location twice, but could not see him either time for he was down in rockpiles.

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great basin rattler, gravid female, House Range foothills

early Sept 2010, great basin rattler (Crotalus lutosus), gravid female, House Range foothills, Millard Co, UT

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