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Some Zoo Creatures

Monday, August 30th, 2010

After nearly a week of 100°-110°F temperatures at our house, we took advantage of a very autumnal day (mid 70s) and went to the San Diego Zoo yesterday.  With a heavy cloud layer that didn’t lift until mid-morning, it allowed for some great photography, without having to worry about high contrast situations.  By noon, however, the sun came out, and so did the crowds.  However, with a 2 1/2 year old, we were ready to leave, have a picnic lunch, and head home by then anyway…

lesser spot-nosed guenon Cercopithecus petaurista

Lesser spot-nosed guenon (Cercopithecus petaurista), August 2010

Su Lin the giant panda (Ailuropoda melanoleuca), san diego zoo

Su Lin the giant panda (Ailuropoda melanoleuca), August 2010

Of course, I can’t go to the zoo and just visit the charismatic megafauna.  Some of the lesser-visited attractions are some of the most pleasant for me.  One in particular I like is the exhibit on local (to southern California) rattlesnake species.

Crotalus mitchellii pyrrhus, speckled rattlesnake at the san diego zoo

Speckled rattlesnake (Crotalus mitchellii pyrrhus) August 2010

*As a technical note on the above photo, I handheld that with my 300/4 + 1.4x teleconverter and focused through glass.  The image was pretty sharp, but it did take some help in Photoshop to make it look presentable.

Finally, a visit to the hummingbird aviary was in order, before leaving the zoo for the day.

hummingbird in aviary, san diego zoo

Hummingbird, August 2010

All in all, it was a pretty good day!  Even on a family-oriented trip to the zoo, there are many opportunities for photography available.  With so many opportunities, it is a good time to practice refining your skills with flash and exposure so when you’re in the field and a once-in-a-lifetime opportunity arises, you can draw on the knowledge you gained.

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Kangaroo rats galore!

Thursday, August 26th, 2010

In my opinion, kangaroo rats are among the most charming of all animals.  Their cheeks–usually stuffed full with seeds–and their huge hind feet make them adorable in my opinion.  Those namesake feet are also useful: when combined with their long tails, kangaroo rats can be extremely fast and agile, which is useful when you are avoiding predators like owls and rattlesnakes.

I gained an appreciation for kangaroo rats when I was helping one of my professors in graduate school trap Ord’s and Panamint kangaroo rats for a project he was working on.  When we released the animals, they would sit in our hands, almost not wanting to leave.  Indeed, it was hard to walk away from those big black eyes, and that cute face.

In southern California, we have several species of kangaroo rats, and they can be fun to photograph.  Near my home, the most common are the Dulzura (Dipodomys simulans) and the Stephen’s kangaroo rats (D. stephensi).

Dulzura Kangaroo Rat (Dipodomys simulans)

Dulzura Kangaroo Rat (Dipodomys simulans), August 2010

Stephen's Kangaroo Rat (Dipodomys stephensi)

Stephen's Kangaroo Rat (Dipodomys stephensi), July 2009

Yeah, I know, they look pretty much the same.  Most species of kangaroo rats do.  In fact, if an expert on these little creatures hadn’t confirmed their identity for me, I probably wouldn’t be able to tell the difference.  These photographs were taken less than one mile from each other; the Dulzura k-rats like rocky country, and the Stephen’s k-rats like open, grassy areas.  In fact, the chosen habitat of the Stephen’s kangaroo rat is probably partially responsible for the fact that its Federally-listed as an endangered species.

You see, open grassy areas are also the preferred habitat of housing developers.  As huge areas of land have been cleared for new housing in southern California, habitat is being taken away from these small creatures.  While some people had serious problems with the idea that a ‘rat’ was being protected by the Federal government, I hope you can see that this little creature is much more interesting and charming than your typical rat.  To see all of my Stephen’s kangaroo rat images, click here.  To see all of my Dulzura kangaroo rat images, click here.

If you venture further into the Mojave Desert toward Joshua Tree National Park, you’ll find the Merriam’s kangaroo rat (D. merriami).  Again, you’ll see there’s not much difference between this species and the other locals, but apparently enough genetic distance exists to warrant the creation of a new species.

Merriam's Kangaroo Rat, Joshua Tree National Park

Merriam's Kangaroo Rat (Dipodomys merriami), November 2009

While photographing nocturnal creatures can take a bit of getting used to, and may take one or two tries until you figure out a system that works for you, the rewards are definitely worth it–fantastic photos of these charming little rodents!

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Coloration in collared lizards

Friday, July 16th, 2010

Last week, I blogged about the huge variety of wildlife present in Joshua Tree National Park during the hot summer months.  Among my favorite animals in the park are the collared lizards, Crotaphytus bicinctores.  Collareds are aggressive, carnivorous lizards and are extremely flashy this time of of year.  They mate in late May-early July, and because of that, they have some fantastic colors.

male great basin collared lizard, joshua tree national Park california

Male Great Basin Collared Lizard, July 2010

The rich yellows and oranges on the legs, blue under the neck and black in the pelvic and pectoral areas are all characteristic of this species, and in my opinion, what makes it so beautiful.  The lizard above is a very accommodating male we found on the 49 Palms Oasis trail.  The females, however, are much less vibrant.

female great basin collared lizard, joshua tree national park california

Female Great Basin Collared Lizard, July 2010

Despite her more drab appearance, I still like the subtle hues present, especially the orange markings on the lateral sides of her body.  After the breeding season, these orange markings will fade, leaving the females a brownish color.  What do they mean?  While its long been known that animals change color, plumage, etc during their breeding season, a 2004 study published in the journal Herpetologica suggests that in female collared lizards, the orange markings signal to males that she is sexually receptive.  On average, orange female collared lizards were courted 5 times more frequently by males than non-orange females.

Its always important to remember that things that may just appear pretty (or sometimes, even ugly) to us very often have a function in nature.

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Bighorn Sheep in Joshua Tree

Wednesday, July 14th, 2010

In my last post, I talked about some of the wildlife one can expect to find in the Mojave Desert on a hot summer day.  As it happens, that’s really only a small fraction of the diversity you’re bound to see.

After photographing birds, reptiles and insects, we headed over to my secret bighorn sheep location in hopes of finding at least one species of charismatic megafauna.  My spot did not disappoint: within about 20 minutes, I spotted a bighorn sheep ewe high on a rock, overlooking the landscape.

Desert bighorn sheep (ovis canadensis nelsoni) in joshua tree national park, california

The Sentinel, July 2010

The ewe let us walk closer to her, probably because (a) she had a good view of us, and (b) it was too hot for her to care.  Because of her cooperation, I was able to make closer images, especially using my friend’s 800mm lens.

Desert bighorn sheep (ovis canadensis nelsoni) in joshua tree national Park, california

Desert Bighorn Sheep, July 2010

After about 10 minutes, another sheep walked up to join the one we had been photographing.  I made a few more images, then left, so as to not stress them out too much–especially on a hot day!  To see all of my desert bighorn sheep images, click here.

Two desert bighorn sheep in joshua tree national park, california

The Sentinel's relief, July 2010

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A visit to Joshua Tree, part 1

Monday, July 12th, 2010

Last week, a friend and I headed out to Joshua Tree National Park in search of summer wildlife.  There’s no doubt the desert is not a fun place in July–we started the first of three hikes in 80+ degree temperatures and ended up hiking in 100+ degrees, but it was a productive trip.

We started the day near the Black Rock Campground in hopes of finding Scott’s Orioles to photograph.  We did see several orioles, but they buzzed by at top speed, with no interest in stopping for us to photograph them.  Instead, we did find several very accommodating Ash-throated Flycatchers, and I got some nice shots of these pleasant birds.  To see all of my Ash-throated Flycatcher images, click here.

ash-throated flycatcher, joshua tree national park, california

Ash-throated Flycatcher, July 2010

After spending a couple of hours hiking in this area, we headed over to the 49 Palms Oasis trail, which is a fantastic place to photograph Chuckwallas and Collared Lizards.  We weren’t successful in finding many Chuckwallas, but we did find a few flashy and cooperative Collared Lizards.  These are some of my favorites, and I was very happy to find some that were so willing to let us photograph them.  To see all of my Collared Lizard images, click here.

great basin collared lizard, joshua tree national park, california

Great Basin Collared Lizard, July 2010

Great Basin Collared Lizard, joshua tree national park, california

Great Basin Collared Lizard, July 2010

When its over 100 degrees Fahrenheit outside, its easy to see why these heat-loving lizards would seek refuge in the bushes rather than the rocks–its much cooler!  Even in the upper photo, you can see the lizard’s toes lifted off the rock–presumably they stay cooler this way.

After these two very hot hikes, we headed into the main part of the park to look for antelope ground squirrels and dragonflies.  No squirrels were to be found, but we did find a scavenger-like scrub jay, as well as several dragonflies, including a new one for me: red saddlebags.

scrub jay, joshua tree national park, california

Western Scrub Jay, July 2010

Red Saddlebags, July 2010

In addition to this, we found several desert bighorn sheep (future post), and a few other cool things.  Despite the heat, it was a great day in our local National Park!

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Zion National Park “wildlife”

Thursday, January 21st, 2010

When I pulled into the visitor center lot at Zion a couple of weeks ago, there were 3–three–cars in the parking lot besides my own.  If you’ve been there during the high season, you know that’s unheard of; unless you’re there at 5am, you are not getting a parking spot at the visitor center!  The solitude that comes during winter in Zion is pretty amazing.  In the canyon, there are birds everywhere–spotted towhees, dippers along the river, etc–and driving into the east side of the park, you stand a good chance of seeing desert bighorn sheep.

A desert bighorn sheep (Ovis canadensis nelsoni) in the Zion National Park high country, Utah

Desert Bighorn Sheep (Ovis canadensis nelsoni), Zion National Park, January 2010

We saw several bighorns between the tunnel and the park’s east entrance, and I do not know if I’ve ever seen one there in the summer.  Perhaps they spend the hot summer months at higher elevations, but regardless, it was a real treat to see these sheep.

There’s no question desert bighorns are true rock climbing masters; their hooves stick to the sandstone very well.  Amazingly, there is another group of specially adapted rock climbers that is often seen in Zion.  Driving up the canyon, admiring the Virgin River, we ran across a group of these climbers.

A rock climber ascends the route Moonlight Buttress, Zion National Park, Utah

Climber on Moonlight Buttress, Zion National Park, January 2010

Zion is a practically a Mecca for rock climbers.  While I’ve always thought it would be very cool to tackle a rock wall like this, I have never gotten into this kind of climbing.  I’ll leave it to the pros!

To see all of my Zion National Park images click here.  My desert bighorn sheep images (from both Zion and Joshua Tree National Park) can be found here.

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