The Land of the Endless Sky

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Rolling Prairie in Hartley County near the Canadian River Breaks.

Texas is primarily a prairie state.  From the tallgrass prairies of the Gulf Coast to the Blackland Prairies and Cross Timbers and Prairies; and from the semi-arid grasslands of the Trans-Pecos to the Llano Estacado and the shortgrass prairies of the Panhandle Plains, the Lonestar State is largely defined by these graminoid-dominated communities.  Despite all of this, our native prairies are all but gone, victims of a relentless onslaught of change.  Much of our prairie was outright destroyed, converted to agricultural crops or development.  Others suffered from the removal of important disturbance elements like fire and the most iconic prairie denizen of them all, The American Bison.  At the same time these important components of prairie maintenance vanished, new, exotic species were introduced, forever changing the composition of the land.

Fortunately, there is still some good prairie left, for those who know where to look.  I have been lucky enough to see high quality virgin coastal prairies, some of the finest Blackland Prairie in the state, and the wildflower laden meadows of the Grand Prairie in spring.  Yet despite all of this, I had not spent time in the mid and shortgrass prairies of the panhandle since 2008, when I worked on a project researching Snowy Plovers in the playas and salt lakes around Lubbock.  This year I sought to change that, and Carolina and I spent a few days here on our big summer roadtrip.

Our first stop was the far northeastern corner of the Panhandle, where we went looking for milkweeds in Hemphill and Lipscomb Counties.  After a long drive from our Pineywoods home, we finally arrived to find the Butterfly Weed (Asclepias tuberosa) in full bloom.  This species is common around our home, but it was a different experience altogether seeing them growing in large clumps among the prairie grasses.

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Butterfly Weed in a midgrass prairie of the eastern Panhandle.

The Butterfly Weed was certainly exciting to see, but I had my heart set on a real Panhandle specialty – the Showy Milkweed (Asclepias speciosa).  It is a wide ranging species, occurring from the Great Plains west.  It barely enters Texas, where it can be found at a few sites in the Panhandle.  We were fortunate enough to find it growing among a variety of grasses and sedges in the narrow floodplain of a small stream feeding the Canadian River.

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Showy Milkweeds blooming along a small stream in the Canadian River drainage.

I don’t think I’m going out on a limb by saying this may be our most beautiful milkweed.  The plants may reach a meter or more in height and are adorned by huge clusters of bright pink flowers with elongated hoods.  They are very fragrant, and we observed a wide variety of pollinators seeking nourishment from their blooms.

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Asclepias speciosa flower detail

After spending time among the milkweeds, we trekked west across the Panhandle.  We chose to take the lesser-traveled county roads and were rewarded with scenes of blooming wildflowers and rugged topography.

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CoreopsisGaillardia, and Monarda bloom in a Panhandle prairie.

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Carolina Larkspur (Delphinium carolinianum) against a background of dried prairie grass.

While traversing the rugged Canadian River breaks, we spotted the unmistakable form of an Ornate Box Turtle (Terrapene ornata) in the road.  It’s hard to find a reptile with more personality than a good box turtle, and Carolina affectionately named this one “Manuelita”.  In my experience, there are two types of box turtles, those that seal themselves in with their hinged plastrons, and those that make a break for it. Manuelita was definitely the second type, and as soon as we put her on the ground she took off like a bullet, or at least a turtle’s version of a bullet.  I would not have been able to capture a singe photo of her if it were not for Carolina, who was able to read her body language, and gently calm her down enough that she would sit still for a brief time.  After a brief photo session, we watched as she vanished into the prairie, moving quickly away from the road.

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Ornate Box Turtle

From there we made our way to the Rita Blanca National Grasslands near the borders with Oklahoma and New Mexico. Our first evening camping here brought with it rapidly darkening skies of a blue norther that foreshadowed the violent storm to come. The wind hit first, creating turbulent waves in the sea of prairie grass. When the rain and lightning arrived, we retreated to the tent and huddled in our sleeping bags. The temperature dropped into the lower fifties, and through the rain fly of the tent we could see champagne pink flashes illuminating the darkness, and hear, or rather feel, the bone jarring thunder that followed. The wind was so strong that the tent walls flexed and the ceiling dropped several feet. I wondered if it would hold up, but when the storm passed the old sturdy ‘gal who had seen us through many adventures remained standing.

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Blue Norther approaching the Rita Blanca Grasslands

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Blue Norther approaching the Rita Blanca Grasslands

As the rain calmed to a gentle drizzle we decided to take to the roads to see if we might turn up some amphibians en route to their breeding wetlands. It turned out to be a productive evening, and we found several Bufo cognatus, Bufo woodhousii, and Spea bombifrons. I only photographed a single B. cognatus that appeared to be heavily gravid. It is amazing that organisms that rely so heavily on water can be so abundant in a place where it seems so scarce.

It was a humbling experience to be at the mercy of such a force of nature so powerful and destructive as that blue norther, and to see the vital role it played in ensuring the survival of so many species.

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Great Plains Toad (Bufo cognatus)

The next morning I had ambitions of rising early and photographing the sun rising over the prairie. When my alarm went off at some painful hour, however, I woke to the sound of gentle raindrops bouncing off the tent’s rain fly. It was the perfect sound for sleeping, so I drifted back asleep and woke again some hours later.

We went out into the damp morning to see if the rains may have spurred some animal movement. After a few miles, Caro spotted a nice Pronghorn (Antilocapra americana) buck on a yucca-laden hillside. It looked at us for a moment, and took off running to the crest of the hill. A pronghorn in motion is a beautiful thing. Their movements are so fluid-like and effortless. There is nothing on this continent’s land that can match their speed, and their aloof attitude makes one think that they know it.

We moved forward along a curve in the road to try to get a closer look at the buck where the ridge intersected our path. There he stopped for a moment to mark his territory and again took to running. It became evident that he was stopping every hundred yards or so and scent marking. Caro postulated that perhaps he was concerned that the rains had washed his scent from his territory.

We watched him cross the road and find a small gap in the fence. From there he disappeared over the distant horizon. In all we probably spent 10 minutes or more watching him, and I managed an image of him mid-gallop.

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Pronghorn Buck

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Pronghorn Buck

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Pronghorn Buck Running

The wildflowers were looking rejuvenated after the rain.  In fact, the cool, wet spring and the region had experienced resulted in a verdant paradise of grasses and forbs.  I delighted in photographing a single Prairie Snowball (Abronia fragrans) plant.  The specific epithet fragrans is appropriate, as the flowers emit a wonderful aroma into the early morning air.  Like many species of Abronia, it is often pollinated by nocturnal moths, and the flowers open in the evening and generally close by mid-morning.

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Prairie Snowball

The Plains Penstemon (Penstemon ambiguus) was at peak bloom, decorating the prairie with patches of pink and white.

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Plains Penstemon

We also found a few late flowering patches of White Penstemon (Penstemon albidus).  Some had a slight hint of purple to the blooms.

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White Penstemon

With such an abundance of wildflowers, the pollinators were out in force as well.  The most striking were the striped-sweat bees (Agapostemon sp.) that were feeding on the abundant thistles.

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Striped-Sweat Bee

The Rita Blanca National Grassland is a haven for grassland birds. Many of the species that occur here are declining at an alarming rate as the prairie habitat they depend on vanishes or changes to a degree that it can no longer support them.

We drove slowly with the windows down so that we may hear them. Western Meadowlarks, Cassin’s Sparrows, and Horned Larks sang from the fence posts. We saw Burrowing Owls taking advantage of the numerous Black-tailed Prairie Dog towns scattered throughout the plains. We watched Greater Roadrunners dart along the primitive grassland roads as we listened to the distant whistling of Northern Bobwhites.  Small, isolated woodlots provided a haven for birds like Bullock’s Orioles, Western Kingbirds, and Red-headed Woodpeckers. 

At one point we were dive-bombed by aggressive Long-billed Curlew’s, a sure sign that they had a nest nearby. In Texas, these remarkable shorebirds only nest in the extreme northwest corner of the panhandle, which is close to the southern extent of their breeding range. Their nest was on the opposite side of a fence that we didn’t cross. Though the land was still public, I didn’t want to risk damaging the superbly camouflaged eggs which are laid in little more than a depression in the dried grass.

I photographed at Lark Sparrow (Chondestes grammacus) as it foraged in the short grass, and was fortunate enough to photograph an iconic prairie bird, the Grasshopper Sparrow (Ammodramus savannarum), as it sang its hissing song from atop the fading blooms of a yucca. The birds alone would be worth the trip, but they were only one part in an incredible community of plants and animals that captivated my every moment in this special place.

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Lark Sparrow

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Grasshopper Sparrow

Among the numerous grassland birds is an elite killer, and a “respectable prairie raptor”, as my friend and U.S. Fish and Wildlife Service biologist Matt Whitbeck would say: The Swainson’s Hawk (Buteo swainsonii).  These open country specialists undertake one of the most impressive migrations of all raptors, breeding in western North America, as far north as Alaska, and wintering in Argentina.  During migration they may form large “kettles”, delighting bird watchers as they pass overhead en masse.  They take a variety of prey on their summer hunting grounds, including prairie dogs, ground squirrels, rabbits, and even Burrowing Owls.

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Swainson’s Hawk

As the rising sun warmed the prairie, we caught sight of a special creature scampering across an open patch of prairie soil.  It was a Texas Horned Lizard (Phrynosoma cornutum), our state reptile, and one of the most famous icons of the Texas prairies.

Texas Horned Lizards have declined or disappeared throughout most of the state, however they continue to thrive in parts of the Panhandle and Trans Pecos. We saw several scurrying about in the late afternoon. These tiny dragons feed primarily on ants, and will often sit near a harvester ant mound picking off foragers as they move to and from the colony entrance.

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Texas Horned Lizard

Viewing a Texas Horned Lizard from above reveals its incredible and intricate patterns and textures.

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Texas Horned Lizard

It was a bittersweet feeling when our time at the Rita Blanca National Grassland came to an end.  It meant saying good bye to the prairies of the Panhandle, but it also meant we would be continuing our journey westward into the Land of Enchantment.  My time in the Panhandle Plains left me enamored with the landscapes and specialized flora and fauna of the area.  It is a long drive from the Pineywoods, but one I will gladly make again.  Until then, I will dream of incoming blue northers, running pronghorn, and the dawn chorus of grassland songbirds.

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Rock Outcrop in Potter County

 

 

The Terning of the Tide

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Courting Sandwich Terns

Nature is a magical thing.  The lives of plants and animals are filled with beauty, drama, failures and triumphs, terror, violence, and tenderness.  Capturing these candid interactions on camera is a dream for any nature photographer.  But it is no easy task.  Doing so requires that the subjects accept you into their world, and most species are reluctant to do so.  There are those special times, however, when patience and persistence pays off, and the determined photographer is rewarded with a rare glimpse of the intimate beauty of nature.

I had one such opportunity recently, when a business trip to Galveston corresponded with the tail end of migration along the Texas Coast.  By late May the majority of passage migrants have left the area and continued their northward journey.  Yet this is one of my favorite times to explore the beaches of Galveston Bay, as dozens of species of plovers, sandpipers, gulls, terns, and other Charadriiform birds gather here.  It is during this time that many species are courting and pairing up for the breeding season.

The courtship displays of terns, in particular, are beautiful, elegant things.  I rose before daybreak the day after my workshop, and set out for the the Bay, where I hoped to photograph some courting terns and the array of other species sharing the beach.

Despite my best efforts to avoid condensation, my lens was still hopelessly fogged when I arrived.  I dropped to my knees and worked on resolving this issue when I heard peeping sounds coming from all around me, and caught the blurred movement of small birds scurrying about.  They were Wilson’s Plover (Charadrius wilsonia), beach specialists that breed here. Kneeling appeared to have made my silhouette less threatening, and a number of the birds approached relatively closely.  After several minutes I was able to clear the condensation and dropped to my belly.  While I was in this position, the birds approached even closer, and I was able to capture an intimate portrait of a beautiful male.

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Male Wilson’s Plover

This particular location includes a large bird sanctuary where Wilson’s Plovers and Least Terns nest.  Many of the birds here have been banded and are subjects of long-term studies.  Individual birds may have a combination of colored bands that correspond to sex, age, and other pertinent data, as well as an aluminum band that identifies the individual.

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Banded Wilson’s Plover

I was thrilled for the opportunity to photograph some American Oystercatchers (Haematopus palliatus).  These striking shorebirds have specially adapted bills that help them pry open bivalve shells.  I photographed one as it scoured the Sargassum wrack in search of a meal.

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American Oystercacher

An American Oystercatcher in its prime is a beautiful thing, with clean black, white, and brown lines, bright yellow eyes encircled by orange eye rings, and a long bill that grades from orange to pink to yellow at the tip.

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American Oystercatcher

The dunes adjacent to the Bay were rich in halophytic flora including the lovely Sand Rose Gentian (Sabatia arenicola), which began to open as the morning wore on and the beach warmed.  This species is generally uncommon, and under threat from beach recreation and development.

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Sand Rose Gentian

Before moving onto the main event of courting terns, I took a moment to photograph a Black Skimmer (Rynchops niger).  These wonderfully weird birds have a highly specialized method of foraging that involves flying low and “skimming” the water with their elongated lower jaw.  Once the jaw feels a potential prey item it snaps shut, bringing a meal with it.

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Black Skimmer

Looking down the beach, I could spot a large congregation of Sandwich Terns (Thalasseus sandvicensis) and Royal Terns (Thalasseus maximus).  I knew that many of these birds would be courting, so I devised a plan to approach without spooking them.  I entered the water, which was fortunately relatively calm, and dropped to my belly.  I inched forward for 150 yards or so by slowly dragging myself with my elbows while holding my heavy camera and lens above water.  It was surprisingly physically taxing, and my muscles were screaming by the time I found myself within range.  I rolled over a few times and came to rest in a prime position for capturing the action.  The birds were wary of me at first, but came accustomed to my presence after a half our or so and resumed their normal activities.  Several other birds joined the group, with some landing closer than my minimum focusing distance.

At some point a group of Black Terns (Chlidonias niger) landed within range.  These are spectacular, Gothic looking birds that are just passing through on their journey to breeding grounds in the northern U.S. and Canada.  I was happy to photograph them, despite the difficulties in properly exposing them.

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Black Tern

The Sandwich and Royal Terns were in large groups, so isolating any individual was tricky.  I was happy to capture the Sandwich Tern Below as it stood at the edge of the group, in shallow water that seemed to blend with the distant gray skies.

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Sandwich Tern

The complex courtship displays of Sandwich Terns are fascinating.  They usually begin with aerial displays performed by the males, who will then capture a fish and descend to deliver it to a female.  After the female has accepted, both sexes enter into an elegant, dance-like “strut”.

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Strutting Sandwich Tern

The couple prances down the beach side by side with crests raised.  To initiate mating, the female will move her tail to expose her cloaca, and the male will spread his wings in preparation to mount (see the first image in this blog).  The male then leaps upon her back and after he gains his balance, copulation occurs.

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Courting Sandwich Terns.

After finishing with the Sandwich Terns, I turned my attention to the Royal Terns, which were more numerous.  I captured the image below of an individual that was seemingly left out from the courtship activities.

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Royal Tern

The courting process for Royal Terns is similar to that of the Sandwich Tern.  They begin with aerial displays, followed by the male capturing a fish.

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Royal Tern

One a potential mate has been chosen, the male and female strut in circles around one another.

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Courting Royal Terns

They step in unison…

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Courting Royal Terns

And finally the male presents the fish to the female.

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Courting Royal Terns

One she has accepted, the female moves her tail to expose her cloaca and the male mounts her and the pair copulates.

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Royal Terns preparing to copulate

Sometimes things turn into a bit of a frenzy.  The fish in the image below lost its head when a number of females that were not preferred by the male tried to pilfer the fish from him.  Fortunately he was able to keep the majority of it to present to his intended mate.

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Courting Royal Terns

I find terns to be such elegant animals, and photographing their elaborate courtship allowed me a glimpse inside their complex life history.  And the terns were just the tip of the ice berg that morning!  There are few experiences I cherish more than spending a morning with my belly in the sand, my eye on the viewfinder, and my lens pointed at some feathered thing.  That morning life was good and the beach was beautiful.  Scenes like this, however, are disappearing at an alarming rate, as beach front habitat is rapidly vanishing to commercial and residential development, and the beaches that remain become more crowded with visitors and vehicles.  Coastal habitats, like so many other natural communities, need our help if we want future generations to experience a morning like mine.  Fortunately there are conservation groups actively working to protect this fragile ecosystem.  If these areas and experiences are important to you, please consider donating or volunteering to The Galveston Bay Foundation, Baykeepers, Audubon Texas, and other organizations like them.

Queen of the Summer Night

It’s hard to imagine a more wonder-inspiring  group of animals than the giant silkworm moths of the family Saturniidae.  Anyone lucky enough to encounter one is left awestruck with a memory of the natural world that will last a lifetime.  They are among the largest insects in the U.S., some with wingspans topping six inches, and are decorated with brightly colored, velvety scales of a myriad of colors, from lime green to bright pink.

Among the most impressive of these iconic denizens of the night is Citheronia regalis, known variably as the Regal Moth or Royal Walnut Moth.  This species is, by mass, the largest moth north of Mexico.  They can be found throughout much of the eastern U.S., where they occur in mature forests with a large hardwood component.  They are generally uncommon throughout there range, and appear to be declining in many areas, likely due to a number of factors including habitat loss, pesticide use, and increased urbanization which creates “light traps”, where moths are attracted to artificial lights and perish prior to laying eggs.

I was lucky enough to find the relatively fresh individual pictured below resting below the lights in town.  I brought her to a more remote area where I hoped she might mate, or if she had already mated, find a suitable location to lay her eggs.

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Regal Moth

The life of an adult silkworm moth is both romantic and tragic.  After emerging from their pupae, the clock is ticking to find a mate.  Most species only have vestigial mouth parts, and are unable to feed.  Others do have weakly functioning mouth parts, but still generally do not take food.  Shortly after emerging, females begin filling the air with pheromones, which spread out like chemical tendrils in the night air.  Males may pick up these cues from great distances, and will follow them to the females so that they may mate.  The females then find a suitable host, and lay their eggs.  Within a week of emerging, they are dead.

Regal Moths will utilize a variety of hardwoods, but display a real affinity for hickories (Carya spp.).  The larvae are among the fastest growing organisms on the planet, and will increase in mass by thousands of times from hatching to the point they are ready to pupate.  As they grow, the caterpillars spring barbed spines and take on an appearance so formidable that it has earned them the name “hickory horned devils”.  These spines are purely for show, and they do not sting and contain no toxins.  When threatened, however, the caterpillar may rapidly swing its head from side to side in an attempt to strike a would-be predators.

The caterpillars start off brown and gradually turn green with each molt.  Finally, when they are ready to pupate they take on a bright turquoise hue.  At this point they may be as much as six inches long!  Unfortunately I have never encountered one of this size and color with camera in hand, but I do have an image of one in the brown stage from a few years ago.

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Hickory Horned Devil

Encountering any silkworm moth is a special experience, but spending time with the beautiful Regal Moth is one I will forever cherish.  Like all other organisms great and small, our lives are richer because they exist.