Category Archives: Wildlife in North Florida- Critters Big and Small

The Biology / Art Intersection

Tanya Rogers FSU Coastal & Marine Lab

Blue crab – colored pencil

IGOR chip- human appreciation 150Art is something I’ve always loved almost as much as biology. If I hadn’t been a biology major in college, I probably would have been an art major, and it is the fusion of the two that I like in particular: the realistic artwork of plants, animals, other living creatures, and their environments. There is something I especially enjoy about drawing plants and animals, because to draw them accurately, you have to look at them with a closeness and a consideration beyond the everyday. You notice the forms and structures and beautifully intricate details you would have never seen otherwise. I find that you see the organism in a new light, with a new appreciation, understanding, and respect.

It wasn’t until a couple years ago that I discovered the field of scientific illustration – that this  marriage between biology and art was in fact an entire line of work. Artwork of biological organisms is used for a variety of purposes, including field guides, identification keys, scientific papers, descriptions of new species, textbooks, educational displays, brochures, and posters. A number of people work as full or part time scientific illustrators, often for museums or publishers, or as free lancers. Beyond the fine arts, it appears there’s a market for the exact types of drawings I’ve always loved to create.

Sand dollar and sea urchin – pen and ink

You may wonder why scientific illustrations are still important today given the ubiquity of photography. It is mainly because there are limitations to what photographs can depict clearly. With illustrations, important details can be captured and highlighted, the background and unimportant details omitted, photographic artifacts eliminated (like obscuring highlights and shadows), and the organism best positioned to convey its important features in a way that is easily interpreted. Interactions, behaviors, and assemblages can be depicted that would be difficult or impossible to capture on film. Fossil and other extinct plants and animals can be portrayed as they would look in real life. Illustrations are also very useful for schematics and diagrams, and are very commonly used to depict medical procedures.

Scientific illustration differs from other forms of art in that accuracy is imperative, but aesthetics are also of consideration. Composition is important, as is skillful use of the artistic medium and the portrayal of three-dimensional form, light, shadow, and depth. Great illustrations should look both realistic and visually appealing, capture the right amount of detail, and perform well the interpretive function for which they were created. The medium itself can range widely depending on how the illustration is to be used. Pen and ink, colored pencil, watercolor, and other traditional media are common, and digital artwork is increasingly common today.

The whelk Busycon spiratum – graphite

Last summer I decided to attend the annual conference of the Guild of Natural Science Illustrators held that year in Olympia, Washington. It was a fabulous conference where I met many phenomenal scientific illustrators, all far better artists than me, and all wonderful and friendly people with a common love of both science and art. The talks, workshops, and field trips at the conference, like the interests of the attendees, were a mixture of art and biology, encompassing everything from techniques (like how to draw fish scales accurately) to interesting local natural history (like research on crows’ ability to recognize human faces). I picked up many new techniques and ideas to take back with me and try. Having previously attended college in Washington state, it was also wonderful to return to the beautiful Pacific Northwest for a week.

Ultimately, I plan to go into biology rather than illustration as my primary career, but I hope that illustration might be a fulfilling side venture. I hope you enjoy the illustrations of mine I’ve included in this post, which are all of species found in Florida.

For more information on scientific illustration, visit the Guild of Natural Science Illustrators webpage, or Science-Art.com, where you can peruse the work of many of its members. There are also a number of blogs on science and art, such as this one, which has links to several other blogs on its homepage.

Hughes/ Kimbro (Hug-Bro) Labs Poster

Hughes-Kimbro Lab poster and t-shirt design – pen and ink

Green sea turtle – not actually an illustration, this is a sand sculpture I made on a beach (one of my more bizarre artistic hobbies)

Video: Wildlife Watching at the St. Marks Refuge

Rob Diaz de Villegas WFSU-TV

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Andy Wraithmell by GFBWT kiosk

Andy Wraithmell at the Great Florida Birding and Wildlife Trail kiosk at the St. Marks Refuge.

I want to thank my co-adventurers for joining me on what turned out to be a remarkably wildlife filled day.  Andy Wraithmell from Florida Fish & Wildlife set our itinerary for the day and picked the best spots for the best time. I elaborated on those locations and timing considerations in last week’s post (with a map), which you can read here. It was great to meet Lou and Betsy Kellenberger, who have a real love for the place, and Alicia Wellman,who live-tweeted our day for Florida Fish & Wildlife.  Thanks also to my production assistant, Alex Saunders, for the great photos, and lastly to Refuge Manager Terry Peacock for talking to us.

In the video I alluded to there being too many places, activities, and programs in the Saint Marks National Wildlife Refuge for what ended up being an almost seven-minute piece. Over the years, we’ve covered some of those and I’ll point you to a couple of videos we’ve done along with some additional online resources.

The Whooping Crane Migration Program

The most famous birds associated with the Refuge are the ones you’re least likely to see on a visit.  I did a segment the first year they flew in.  You can watch that video here.  Their struggles this year were well documented, and while the Operation Migration folks ended up having to winter this year’s class in Alabama, one member of that original 2009 class paired off with one of the Chassahowitzka cranes from that year (half go to St. Marks, the other to Chassahowitzka National Wildlife Refuge) and flew to a cow pasture in Tallahassee’s Southwood neighborhood.  That means that they are learning their traditional migration paths, which is hopeful for their future.

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Hiking in the Cathedral of Palms.

The Florida National Scenic Trail

We just recently did a video on the Trail’s Aucilla Sinks segment. Previously, Florida Trail Association’s Kent Wimmer had taken us to two very special spots in the Refuge: Shepherd Spring and the Cathedral of Pines. You can see shots of those at the end of the video above. You can see that full video here.

The St. Marks Lighthouse

We don’t have a video uploaded on the lighthouse, but there is some news regarding it.  The Refuge is in the process of taking ownership of the lighthouse from the Coast Guard.  The plan is to open a bookstore on the ground floor, though the general public will still not be allowed to climb to the top and utilize what should be a sweet vantage point for photographers and (ahem) videographers.

Educational Programs

We see the new educational building and Terry Peacock talks about the number of students that participate in the Refuge’s education programs, but we don’t go into specifics. They offer 18 different programs and will work with teachers to meet their needs. Read more here.

The St. Marks National Wildlife Refuge Association

This group, led by their president, Betsy Kellenberger, coordinates volunteer efforts, classes, and field trips in the Refuge. Lou and Betsy, for instance, helped to build the Whooping Crane pens, which seems to me to be a neat way to be a part of that program. Visit the Association page here.

Music in the piece by unreal_dm and Andrea Pireddu.

Who’s that bird? Nature Viewing app review

Rob Diaz de Villegas WFSU-TV
On Sunday, May 13 at 10:00 AM/ET, you can watch an encore airing of our latest EcoAdventure in the Saint Marks National Wildlife Refuge, a gateway site on the Great Florida Birding & Wildlife Trail.  It lived up to its gateway status with a range of migratory shore birds and residents, and scaly and furry critters.  Dimensions, on WFSU-TV. 

IGOR chip- human appreciation 150I’m not a smartphone guy, though I can see the attraction.  Since we’ve started with In the Grass, On the Reef, I’ve seen their value in an outdoor setting.  Dr. Randall Hughes and Dr. David Kimbro use them to monitor the weather when they’re at their sites.  That’s handy when you’re a twenty or thirty-minute kayak from your car and you see dark clouds in the distance.  There’s a connectivity with a smartphone that let’s you take care of business while on location.  And it allows you to travel with world of information right in your pocket.

The Nature Viewing Along the Great Florida Birding and Wildlife Trail app (search Nature Viewing app) is available for iPhone, iPad, and, just recently, Android- for free.  Its goal is to help you identify birds, butterflies, and wildflowers that you might see in Florida.  I’m not a bird expert, but I like being outdoors and I always see them.

So how does it work?

We’ll start with this photo taken on our Refuge shoot by WFSU’s Alex Saunders.  I remember that he was excited to find and actually shoot this bird, but when I got back I had no idea what species it was. So I borrowed an iPad and installed the app.  It’s 418 MB, which is something to keep in mind if you have space issues.  It’s size likely has to do with the hundreds of photos of plant and animal species included.

This is what you see when you turn on the app:

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I select the bird.  When I do, I see the following options on the bottom row:

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The buttons on the bottom are the filters.  First is class of bird (wading bird, shore bird, water bird, raptor, etc.).  Next is the season in which you saw the bird- important as birds migrate seasonally.  Next is size, and then color.  The last button lists all birds, which gives you a different option for browsing.  As you see in the screen grab above, I selected type of bird first, and these options appeared.  You can hold down any button for more information.  Here I clicked on the duck icon:

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From this description, I see that this icon applies to all water birds, not just ducks.  The bird in Alex’s photo is in a tree, but isn’t a woodpecker or predatory bird, so I select perched bird.

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After that, I select season, which was spring.

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Then I select size, which I at first found confusing, as it associates size with specific birds. Hold down each option to see the size in inches.  Even with that, it can be hard to tell from a photo.  I selected mockingbird size. Next is color:

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The bird is blue, white, and red. Selecting the colors can be tricky, and what I found is that sometimes it’s better to omit colors that appear as a band or a streak, as it’s not always recognized. So I just select white and blue. Once I do, I see there are three matches on the upper right of the screen. I click to see the matches, and get the following possibilities:

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I don’t think that this bird is a type of jay. So I remove options. Why do I do this? With every additional filter you add, there are less options. Sometimes it’s better to omit some information so that you have a slightly larger list to look at. With less options, I get this:

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The Belted Kingfisher looks close. But there are two photos with this entry, and the second photo looks like this:

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So the female has the red band, and I have my match. I’ve found by playing with this that when it comes to color, it’s better to keep it simple (less colors) as color variations for juveniles and females aren’t always accounted for.

_DSC4240_e2_aAt the end of the day, I think that this is a useful app to review photos you’ve taken in the field, or if you’re by the bird and it doesn’t look like it will fly or swim away (as they tend to do when you photograph or video them. They know what’s up). The more I play with the app, the easier it gets, and I do recommend playing with it and getting a feel for it before trying it in the field. If you’re reviewing photos, keep in mind that colors look different in different lighting. For instance, I first tried to identify the kingfisher from this photo taken after it took off. You’ll notice that the blue looks black, and I had less perspective on a size.

Wakulla SpringsThe app relies a lot on how you perceive things, so if you have trouble guessing sizes, you can either try a few options or leave that off.  Same with color; if a bird has two or three colors and you’re not having luck, try picking the most predominant and omit the others.  And then there’s the type of bird.  I was trying to identify what ended up being an anhinga from a photo Alex took at Wakulla Springs.  It looked like a wading bird to me, but it’s classified as a water bird.  Looking at it again, I notice the short legs, where wading birds are large birds with long legs.

If you’re interested in birds, it’s worth a try.  It’s a free download, and even if you’re like me and aren’t very knowledgeable, you can play with it, browse the master list of birds, and learn something from it.

Download the app from the Apple store here.

Download the app for Android here.

Pea Crab Infestation!

Tanya Rogers FSU Coastal & Marine Lab

IGOR chip- biogeographic 150Serendipitous results are surely one of the most rewarding parts of experimental research. This past winter, I spent many weeks processing various frozen components of great cage experiment of last summer, including the several hundred spat tiles placed inside the different cages at all sites along the coast. It was while delicately measuring and shucking these little spat that I made one such unanticipated finding: Our oyster spat, unbeknownst to us, had become infested with pea crabs.

Pea crabs at various stages of development. The ones in the center are young crabs, as they appear in the stages immediately following infection of an oyster. The ones on the right are older, harder-carapaced crabs (most likely males, which may leave their hosts in search of oysters harboring females). The crab on the left is a mature female. The developing, orange-colored gonads are visible through the female’s thin carapace. Since mature females never leave the their host oyster, their carapaces (shells) are very soft and thin. This makes them very… squishy and pea-like.

You might have had the surprise of finding an oyster pea crab (Zaops ostreus) while shucking an oyster yourself. These small crabs live inside oysters and are a type of kleptoparasite, meaning they steal food from their hosts. An oyster gathers food by filtering water over its gills, trapping edible particles on its gills, and carrying those particles to its mouth using cilia (tiny hairs). Pea crabs sit on the gills and pick out some of the food the oyster traps before the oyster can consume it. By scurrying around inside oysters, pea crabs can also damage the gills mechanically. The pea crabs, like most parasites, don’t kill their hosts, but they can certainly affect the oysters’ overall health.

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A gravid (egg-bearing) female pea crab next to the oyster spat in which she was living. The female, like most crabs, carries her eggs until they hatch, and then releases her larvae into the water. The baby crabs, when ready, will locate a new oyster host by smell.

As I was processing the oyster spat from all of our experimental sites (Florida to North Carolina) for survivorship, growth, and condition, I began to notice a surprising number of pea crabs living inside them and started to keep track. What’s interesting was not so much that the oysters had pea crabs, but that the percentage of oysters infected with pea crabs varied geographically. For instance, only about 25% had pea crabs in St. Augustine, Florida, whereas over 70% were infected at Skidaway Island, Georgia. Keep in mind that these spat all came from the same source and the same hatchery, so they all had the same starting condition. What’s more, I found that spat in Georgia which had naturally recruited to the tiles from the surrounding waters (of which there were quite a lot, and for which I also processed condition) rarely had pea crabs. Only about 5% of the recruits had pea crabs at Skidaway Island, Georgia. Why is there this huge difference in infection rate? Do the local oysters know something that the transplants don’t? How do these patterns in pea crab infection relate to other geographic patterns we’re finding? How does pea crab infection affect oyster condition? These and many more questions await to be addressed in further analyses and future experiments.

Sounds of the Oyster Reef

Rob Diaz de Villegas WFSU-TV

IGOR chip_ predators_NCE 150Imagine you’re watching a slasher movie starring mud crabs as the protagonists.  A mud crab leaves the party in the muck under the oyster reef, where the other crabs are chomping down juvenile oysters.  As he pokes his head out from between a couple of shells, you hear a drumming sound and you shout at the screen “Don’t go out there!”

It’s fun to anthropomorphize some of the freaky looking residents of an oyster reef.  But these are the realities of living within the ecology of fear.  Predator cues have a definitive impact on how the smaller, intermediate consumers such as mud crabs behave.  That’s what David Kimbro, Randall Hughes & co. are studying in Alligator Harbor and at their sites across the southeast.  Large predators send certain cues to their prey- perhaps a certain way they move in the water, perhaps.  When the prey species sense that the predators are near, they cease activity- including the eating of juvenile oysters.  That is how large predators help maintain a healthy oyster reef- they make intermediate consumers (mud crabs) eat less of the basal species (oysters, the foundation of the oyster reef habitat). Continue reading

Paint Every Feather

Wednesday, January 18 at 7:30 PM/ ET, watch WFSU’s latest EcoAdventure on dimensions, as Green Guides George Weymouth, Jim Dulock, and Cynthia Paulson guide us down the Wacissa River.  Birds, springs, and art- you can read more about that below, and enjoy this video looking at how George- a well known painter and sculptor in our area- creates his hyper-realistic works.

Rob Diaz de Villegas WFSU-TV
George Weymouth paints black-necked stilts

In the interest of being intensely accurate, George's painting area is surrounded by field guides and nature magazines.

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George Weymouth is telling me how he is going to paint the ripples caused by a black-necked stilt’s (Himantopus mexicanus) wading in a river, and how the the avian subjects of his painting reflect over the disturbed water.  When he’s done getting the shape of the bird’s body, and the general coloration, he’ll add various feathers- primaries, secondaries, and tercials; all located at the anatomically appropriate places on its body.  Something occurred to me as I edited this footage into the above video:  when I had accompanied George down the Wacissa River the week before, he was looking at whole different world than I was.  A man who can accurately paint every feather on a bird is likely to have a unique perspective.

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Horse Conchs Rule the Seagrass Bed

In the Grass, On the Reef: Testing the Ecology of Fear

Premieres on WFSU-TV Wednesday, June 29 at 7:30 PM, 6:30 CT.  In high definition where available.

Rob Diaz de Villegas WFSU-TV

IGOR_chip_predators_NCE_100This clip is a short segment on one of the predators featured in this program: the horse conch.  It’s practically an ecosystem onto itself, as you can see in the video’s poster frame above.  Barnacles, crepidula, bryozoans, and other marine creatures that affix themselves to hard surfaces settle on its shell.  In the video you’ll see its bright orange body as it roams the seagrass beds of the Forgotten Coast.  And you’ll see it eat another large predatory snail, the lightning whelk.

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Photo Feature: Bedazzled Predator

Rob Diaz de Villegas WFSU-TV

Horse Conch shell covered in bivalves

IGOR chip- habitat 150It kind of looks like one of those vintage ’80’s jackets adorned with mirrors and sequins- mollusk style.  This horse conch’s got a little bit of everything on it, the result of an interesting reversal of roles in this seagrass bed on Bay Mouth Bar.

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