mississippi kite eating a bug

Mississippi Kites putting on a show

Posted on Posted in Birds, CoastalMasterNaturalistsFeed, Dewees Island Conservancy

If you’re at the pool, big bend dock, or Old House Lane this week, be sure to look up.  There has been a group of Mississippi Kites overhead, putting on a show, pretty much on a daily basis.  This raptor soars like a falcon on the thermals, and today I saw a total of 13 of them at the same time.  At first glance, they appear to be floating gently along the thermals, almost suspended in the air.

But then one of them will take a sudden movement and whoosh in another direction. Using their square off tail to dip, twist, plummet, and lift, these incredible aerialists are catching dragonflies and cicadas in mid air with their talons, and then eating them as they fly.

mississippi kite

When you look at them with your eyes, it looks like they are just hanging out.  But zoom in with binoculars or a camera, and you can get a clear sense of them as effective predators. Yesterday, I took my camera over to big bend to lie on the dock and watch. They took my breath away with their dizzying dips and turns!

mississippi kites

They snatch cicadas and dragonflies.  The cicadas protest loudly when grabbed, and if you look closely you can see the birds eviscerating them while flying.

mississippi kite

mississippi kite eating a bug

mississippi kites

 

Mississippi Kite 5-6-17 Sewee
Mississippi Kite, photo Pam Ford

Mississippi Kites, Ictinia mississippiensis, are a species of least concern in our area.  In fact, check out this article from Living Bird Magazine about how their range is actually expanding. That said, I have never seen them here as often as I have in the last week. They may be staging for migration: In some states like Texas, they apparently gather in large groups before migrating south.  Each time I have been watching them, there have been blue jays in the trees below, making a screeching sound.  They shouldn’t really object to their presence; apparently blue jays and northern mockingbirds often nest near Mississippi kite colonies. It’s been the blue jays that had me looking up, though, so they are worth listening to.  And the cicada… when the kite first grabs the cicada, it makes a loud buzz, which was another thing that made me look up.  Usually cicada calls come from the trees rather than overhead.

cicada
It’s worth heading out with binoculars!  And while you’re looking up, keep an eye out for swallowtail kites, which feed the same way and were seen here this week last year.

2016 Loggerhead Turtle Nesting Season off to a Roaring Start

Posted on Posted in CoastalMasterNaturalistsFeed, Dewees Island Conservancy, Real Estate

Current Nests

It’s loggerhead turtle nesting season, and here on Dewees we’re on target for a record-breaking turtle season, with our 17th nest discovered and marked this morning near Needlerush walk.  By comparison, last year Dewees had 5 nests for the whole season.  Since we started the turtle protection program in 1999, we’ve seen 217 nests, with an average of 11-12 per year.  The lowest year was 2001, with 1 nest, and the biggest years were 2006, with 21 nests, and 2013, with 20 nests.  Since we’re only halfway through turtle season, we will probably break the record and have the best year yet!

Assuming the state average of 52 days of incubation, we should begin to see hatching nests around the 8th of July.  (Don’t worry if they take a little longer, sometimes the first nests are laid during cooler temperatures and take more time.) This is a banner year for us, and we’re hearing that numbers are up across the state as well.  Last year the state had high numbers of nests, but Dewees had a relatively low number of nests.  There are lots of factors beyond sheer turtle numbers that determine whether we have a great turtle year or a more sparse one: turtles may have a few years between nesting cycles, sand bars and natural erosion/accretion cycles make a difference, etc.  Our hunch is that last year the sand bar (which brought us lots of great sand) provided a hazard to turtle navigation and they gave up when they hit the sand bars.  This year, we have plenty of high dunes for them to nest in, and a huge open beach with very soft sand.

We take one egg from each nest for DNA testing, which enables us to learn more about the mother (the eggshell is cleaned of yolk so it contains just maternal DNA.)  This project, through the University of Georgia, has taught us a lot about our turtles– many of the turtles who nest on Dewees also nest on Capers, Bull, IOP, Sullivans, Cape, and Lighthouse islands.  Far fewer nest to the south of us on the other side of the Charleston jetties.  Gary McGraw, the team leader, keeps a chart of where Dewees turtles nest based on the returned DNA data.

 

Loggerhead turtle nesting
Gary shares the DNA testing protocol with a young visitor

I’ll try to keep this page updated as we go through the summer with nests and predicted hatch dates.

Nest Inventories

72 hours after first evidence of hatching, we will conduct a nest inventory to see how successful the nesting was. All members of the Dewees community are welcome to join.  Inventories are usually conducted in the evenings around 7:30, and will be announced on the activity calendar and on the ferry. Sometimes, during an inventory, we get the thrill of seeing live hatchlings.

Dewees Island Loggerhead Hatchlings from Judy Drew Fairchild on Vimeo.

You can be a part of the loggerhead turtle nesting team.


Yesterday, we tried to post a spreadsheet with the nesting information so far.  Sorry, but something about that created a problem for the blog, so I have cut and pasted the relevant date.  Eventually we’ll get that up in a dynamic form, but for now, you’ll find a chart at the bottom with the nests and predicted hatch date.  If you want to check nests near the hatching time, please let Judy or Gary know, and be sure not to use white flashlights on the beach– they can disorient the hatchlings.  In addition, you can still sign up to walk in the mornings by clicking the sign-up form below.

Sign Up Now!

Nest # location date discoverer Predicted Hatch Date
52
1 far north, north of jeep trail 5-17-16 interns 7-8-16
2 north near sand fence 5-23-16 Lee M 7-14-16
3 near DeMayo walk 5-28-16 Claudia/Lesa 7-19-16
4 far north Capers Inlet 5-28-16 Jade Gentry 7-19-16
5 near Ancient Dunes 6-3-16 Judy 7-25-16
6 near MarshMallow 6-4-16 Lesa 7-26-16
7 north of Osprey 6-6-16 Jane 7-28-16
8 north of Osprey 6-16-16 Low 8-7-16
9 North Osprey near posts 6-18-16 Sarah 8-9-16
10 north of Osprey 6-20-16 Jane 8-11-16
11 South of Ancient Dunes 6-20-16 Carroll 8-11-16
12 Just South of Osprey 6-21-16 Maggie 8-12-16
13 just north Osprey 6-21-16 Allie 8-12-16
14 Just south of willow 6-22-16 Caitlyn 8-13-16
15 Far north Capers Inlet 6-22-16 Maggie 8-13-16
16 Just north of Needlerush 6-26-16 Lesa 8-17-16
17 South of Ancient Dunes 6-28-16 Linda  8-19-16

It’s Bat Week! The story of a Tree Bat on Dewees

Posted on Posted in CoastalMasterNaturalistsFeed, Featured Creature, Mammals

I’ve seen bats on Dewees fairly often in early spring, and occasionally in summer. Since it’s National Bat Week (who knew?!) I thought I would share a story of a lovely encounter with a tree bat in June. I was headed to the beach for a turtle walk slightly before sunrise through the maritime forest, and I was following what I thought was a pale winged warbler/wren through the rather dark forest, when suddenly it seemed like a pine cone fell in front of me, and a small chip broke off and fell slightly further away.

Tree Bat, Seminole
What I thought was a pinecone and a chip

Something seemed weird, so I parked the golf cart and walked up to find a small bat with dark reddish brown wings spread out along the sandy path. The tiny chip turned out to be a baby bat about a foot away, and the mother flew off when I got close, so I retreated about 50 feet to see what would happen. I got back in the golf cart because for some reason the birds are happier when I am not on foot, so I figured that might apply to bats.

Lasiurus seminolus
Baby bat waiting for the mother to return

It was hard to see in the pre-dawn gloom, but eventually the mother returned and covered the baby and froze on the ground.

Tree Bat, Seminole Bat
Mother bat covering baby

I went closer to look and could see the small arm of the baby reaching around the mother’s neck, like a hug, and as I went for the camera she seemed to tuck it underneath and flew off with the baby.
tree bat

You can just barely see the baby on the right side of the photo above.

tree bat
Seminole Bat before flying off

I was left with a bunch of questions: What species are possible? Where do they nest/roost? What would make a bat drop a baby? Is that some ecosystem thing to worry about? I assumed that intervention would make things worse– but should I have done anything differently?

I emailed my South Carolina Master Naturalist Instructor and guru, Keith McCullough, and he said he’d research it and get back to me. He reached out to a grad student at Auburn who had been doing bat research at Caw Caw County Park, and this is what she said:

The bat in the pictures is either an Eastern red bat (Lasiurus borealis) or a Seminole bat (Lasiurus seminolus). It’s kind of difficult to tell from the colors in the picture, but it looks more like a Seminole based on the mahogany colored fur.

Baby bats can be born at up to 40% of the female’s body weight (!) and only increase in weight as they grow. Most tree bats (what reds and Seminoles are called) forage with their babies clinging on to them. It is not uncommon for the baby to fall off the mother while she is flying and sometimes people assume they’re rabid and kill them. Finding a bat like this is nothing to worry about. It is possible that the baby was falling off the mom and the mom was trying to catch it. It is also possible that something entirely different was happening. I’ve heard of bats occasionally falling out of trees but I’ve never seen one do it.

Lasiurine bats are some of my favorites and are absolutely gorgeous! These bats tend to roost in foliage or under exfoliating tree bark. Females can have 1-4 pups, but having only one or two is more common.

I was relieved that there was nothing ecologically wrong going on, and also that I had been right to back off and not intervene. I also agree with her that tree bats are certainly are beautiful bats, and I hope to find them again in the maritime forest. I drove that road most of the summer before dawn, but didn’t find them again. I did do a little research on Seminole Bats, part of the family of tree bats, and this is what I found:

I came away from the experience with a little awe– these amazing animals are right outside our door, feeding little ones and roosting in the trees, and we are mostly unaware of them. I felt fortunate for the magic of the encounter that let me glimpse a little of that hidden life.

The US Department of the Interior put out this interesting bat video in honor of bat week:

How to use ebird to learn what birds you might see on Dewees

Posted on Posted in Birds and Birding, Charleston Area, CoastalMasterNaturalistsFeed, Island Living
ebird Dewees Island yellow warbler
Yellow Warbler

It’s migration season, and there are wonderful birds passing through.  If you’ve ever wondered what you might expect to see, you can use ebird as a great resource.  In fact, you can even use it to find out when the birds you MOST want to see will be on the island.

Northern Gannet in Charleston Harbor

Here’s how to use ebird to find out about a particular species:

Ebird is an incredible database out of Cornell University.  Anyone can use it without being a member, although there are some benefits that make membership worth it.  Suppose you were fascinated by Northern Gannets, who migrate through the area in winter and spring, and you wanted to time a visit to see them.  You could use ebird to help you plan when to come to the island.  Here’s how:

Start by going to ebird.org.  Click on explore data.

how to use ebird

Then, select species maps:How to use ebird

Then enter the species name that you’re interested in:

How to use ebird enter species name

Use the zoom tool to focus on where you’re traveling:

ebird 4

Keep zooming until you can see buttons where people have entered data.

ebird 5

Click the buttons for detailed lists:

ebird 6

While you are exploring ebird, you can find some other amazing resources, from interactive maps to migration “forecasts” to rare species.  If you decide you’d like to enter data on ebird, every piece of information helps us track and understand birds– from migration patterns, to climate effects, to species in peril.  Reach out if you need some help!  You can also click here for an weekly record of specific sightings on the island:

 

Minks on the Island

Posted on Leave a commentPosted in CoastalMasterNaturalistsFeed, Uncategorized
Mink
Allen Mitchell caught this photo of a mink on the island last spring.

One of the mammals we have on Dewees Island is a mink, mustela vision. We haven’t seen them on the island very often, but sightings are on the increase here. Keep your eyes open while riding around or fishing, and you may be treated to the sight of one of these elusive mustelids. Native to North America, the species has also been introduced to Europe and South America, expanding the range (which makes it classified as a species of least concern). Hunted widely for their pelts since before colonial times, there were once two species of mink along the eastern coastline. The other, the sea mink, was widespread in the northeast, and was one of the only carnivores hunted to extinction in modern historical times. It was larger than the American Minks we have, with a larger pelt, with an estimated extinction date in the 1860’s. This South Carolina Wildlife magazine article from 2009 describes the history of the mink and efforts to assist conservation efforts in the state. That article was mentioned in this blog post of 2009.

South Carolina’s mink population, once abundant, declined dramatically about half a century ago, with various forms of pollution thought to be at least one cause, since mink are highly susceptible to environmental contaminants…
Since 1999, a DNR restocking effort has aimed at restoring the mink population along the coast north of Charleston, where mink have essentially been absent for decades.

Dewees Island was a location for restocking, with at least one restocking project demonstrating the food chain in action. (As a mother mink with two young ones was released at the edge of the marsh, a Northern Harrier swooped down and made off with the mother, prompting Arla, the island naturalist, and Rachel, the intern, to plod through the pluff mud to rescue the young minks from certain demise. If you were there, or have photos of that, please share!) Subsequent efforts to re-establish mink populations in Cape Romain may have been so successful that the mink spread southward. We have seen mink ourselves several times this year, at various places on the island, and many anglers have reported seeing them near popular fishing spots.

mink
copyright Cathy Miller

 

mink
copyright Cathy Miller

They are solitary animals who tend to be most active at dusk and dawn, although we have seen them at midday as well. Often found near water, they eat fish and small animals. Dewees Birder Cathy Miller captured these shot of a mink at Huntington Beach state park, eating an American Coot.

Major predators of mink include bobcats, foxes, great horned owls, and alligators.  While hunters still take a few mink, the fur trade relies  almost completely on commercially farmed mink.

We had a good time watching one fish Velvet creek a few weeks ago, hopping up and down on the bank, diving into the water, catching fish, and hopping back up on the bank. I headed over there, hoping to get a photo of tracks, but there was so much wrack on the bank it was impossible.  Click here to see mink tracks at the very helpful website beartracker.com.

I find myself looking for mink every time I am out and about.  In the meanwhile, here are the photos I took (from a distance) of the one we were watching.  Feel free to comment in with details of your own mink sightings.

 

 

 

Post and Courier: Marsh Mink returning to Coast, January 2002.

Fishing Rodeo Well Underway

Posted on 4 CommentsPosted in CoastalMasterNaturalistsFeed, Fall, Island Living
trout fishing
reeling in a trout near six pipes

Dewees Island is a fabulous location for fishing, and catching your own is one way to avoid the sort of fish fraud detailed in yesterday’s article in the New York Times. The 2012 annual fishing rodeo is well underway on the island. My attempts to find out the story of how this started have come up empty, with a few folks chuckling and saying something like… “I might have some vague memories of that…” but that’s about it. So if you have your own stories about the fishing rodeo, please comment in on this post.

Here is what we do know: Dewees Island has an annual fishing rodeo, wherein teams of up to seven people sign up to fish on a particular day. You have to sign up at least two weeks in advance, which is why there were two different teams fishing Friday and Saturday in the winds and vagaries of Hurricane Sandy. Each team earns points by catching fish.  The five fish that count are Sheepshead, Red Drum (Spottail Bass), Black Drum, Sea Trout, and Flounder, and the members of the team are responsible for keeping track of the total inches of fish caught. (Sadly, mullet, shrimp, and crabs don’t count.)

Any lot owner or homeowner may participate and enter his/her team. Each team may have up to seven teammates, including the team captain.  No other team can fish on another team’s registered day.  I think an angler can only fish on one team per year.

trout fishingIn order to encourage more children to participate, the point system is as follows:

  • Teammates 15 years old and older will receive one point for each inch of eligible fish caught.
  • Teammates under 15 will receive 1.5 points for each inch of eligible fish caught.

In order to encourage participation among families that cannot scrape up a team of seven, smaller teams get handicap points.  All teams with fewer than seven teammates will receive a 50 point handicap for each missing person.  (A team registering 5 people will start with 100 points).  Island staff members are welcome as teammates.  (And this could be a good strategy, as some of them have their own fishing charter experience!)

Each team may fish at any time from sunrise to sunset during their registered day, but the TOTAL FISHING TIME WILL BE LIMITED TO EIGHT HOURS. This will give all hard working anglers a much-needed break.  In order to take advantage of the best fishing times of morning and dusk, a team’s eight-hour time slot can be broken up as they wish. One team may fish, for example from, 6AM-10AM, and then again from 5PM-8PM.

Another team might choose to fish from 9AM-5PM. This will allow each team to choose the best tides of the day for fishing.  If any team member is fishing at any time, this counts against the entire team’s 8 hours. Team spirit is encouraged. Some teams even issue t-shirts! Others gather for a meal the night before to plan out hours, bait, and strategy.  Some teams appoint snack-ticians, who deliver breakfast or beer by golf cart to those hard working anglers.

You can fish from land at any of the island’s fishing spots, including six pipes and Chapel Pond.  Your group can divide up to cover the ferry dock AND Big Bend dock.

Each teammate will receive a scorecard to record his/her points. The team captain will tally up the team’s points and submit his/her team’s total score to Joan. The Rodeo is about fun and learning, so scorecards must be itemized and tallied. Teams who submit scorecards that aren’t tallied will be disqualified. Unusual fish or great fishing stories are encouraged to be recorded on the Captain’s Log. (and this blog!) For example, this year one team was fishing at Myrtle Dock.  One member finally caught a fish and whipped out his iphone to record a photo.  What the phone recorded was its own fall off the dock, bubbles and all.   Luckily for the angler, he had his phone in a lifeproof case, and he was able to retrieve both the phone and the photo!

We’d love to hear your stories about this (or previous) year’s teams and adventures.

Unusual High Tides last week

Posted on 2 CommentsPosted in Charleston Area, CoastalMasterNaturalistsFeed

Charleston County has been under a coastal flood watch for most of the week, as a combination of astronomical high tides (spring tides, perigee moon, new moon) have coincided with days of wind from the east, pushing more water up into the marsh. Add two inches of badly needed rain, and navigation on island roads has been interesting. Navigation on mainland roads has been even trickier– I couldn’t get out of the parking lot onto 41st street on Thursday. Since I was only headed into town for a haircut, I decided it wasn’t worth potentially damaging my car, so I turned around!

Waterway, minus landmarks
dewees dock
approaching the Dewees dock on the IOP
the dock is almost above the landing
climbing up to the ramp

 

Water at the marina

 

Tide at the fire station at the entrance to the Dewees Marina on 41st st
You can barely make out the edges of the island along the cut to Dewees, with the storm headed our way

Pelicans

Posted on Posted in Birds and Birding, CoastalMasterNaturalistsFeed, Featured Creature

pelicansSometimes I think Pelicans are the clowns of the bird world, and sometimes I am awed by their grace. The bird featured below caught a huge red drum, and I wasn’t at all confident he was going to be able to eat it!

The pelican we are most likely to see on Dewees is the Eastern Brown Pelican. (Although we have seen White Pelicans on nearby Capers Island). It is the only pelican that feeds by plunge diving, and they can drop from great heights. According to Birdscope at the Cornell Lab of Ornithology, Pelicans have several adaptations to diving, including air sacs beneath the skin on their breast that serve as cushions and floats. While diving, they also rotate their body to the left, probably to avoid injury to their trachea and esophagus, which are on the right side of neck.

The eastern brown pelican was listed as an endangered species in 1970, when their population plummeted to less than 100. Widespread use of pesticides such as DDT caused thinning of eggshells, which subsequently broke during incubation. The United States ban on DDT in 1972 and similar pesticides spurred the pelican’s recovery to much of its former range. The implementation of the Brown Pelican Recovery Plan of 1979 also contributed to the restoration of brown pelican populations. (SCDNR) Now they’ve had such a spectacular comeback that they’ve become a symbol of wildlife conservation, and they’ve been delisted from the endangered species list.

The pelicans we see on the island probably nested at nearby Crab Bankpelicans, with large colonies of other pelicans and other colonial nesters, like terns and black skimmers.

They are strong swimmers, with webbing between all four toes. Their colors are brighter in breeding season, when they have one monogamous partner for the whole of the breeding season. Juveniles are brown with a white belly, and it takes three years for them to change to adult plumage.

In addition to plunging, they can also seize food from the surface of the water. Pelicans have a gular pouch that helps them catch food, and a hook on the upper mandible to help hold slippery fish. I came across this explanation for how it works at a website called How Stuff Works:

Another unique feature is the hook at the tip of the pelican’s upper mandible (the top half of its bill), which helps grab onto particularly slippery or wiggly fish. After locating and scooping up its prey, the pelican opens its bill and slowly contracts its pouch to empty out the water and keep the fish inside. Then, with a jerk of the bird’s head, the fish slides down the ­hatch. If a fish is particularly large, the pelican might manipulate it so that the fish goes down head first, which helps keep it from getting stuck. A pelican can’t eat or fly away if its pouch is still full of water, so the draining process is very important. By bending its neck, it can even turn its pouch inside out.

They can also soar right above the surface of the water, using the slight updrafts from the wave troughs in a process called dynamic soaring. This allows them to save energy as they fly.

This juvenile clown was fishing from slightly above the surface in Chapel Pond.
pelican
when he caught a fish that must have been bigger than he expected:pelican
and even though he tried to keep it to himself,
pelican
his friends swooped in and clamped down on his beakpelican
After shaking them off, he retreated to a spot where he could regroup

pelican
and try to wash the fish down with water.
pelican
pelican
pelican
pelican
and he finally moves on after somehow washing the fish down.
pelican

Here is a related post about releasing a Pelican after rehabilitation.

At a workshop at the South Carolina Aquarium, I told the story of watching this pelican, and wondering if the pouch could withstand all that action. The bird rehabilitation specialists told me that the bird was lucky– if he (or one of his exuberant friends) had punctured the gular pouch, there is almost nothing that can be done for them– sutures won’t hold, and trying to repair a tear actually makes the situation worse. Most birds with gular pouch punctures have to be euthanized. So I was glad to see this guy finally move along!

Some Books to think about giving for the Holidays

Posted on Leave a commentPosted in Birds and Birding, CoastalMasterNaturalistsFeed, Dewees Books


Last weekend, when the Pro-Birder conference took place on Dewees, I was delighted to receive a gift from Instructor Drew Lanham. I had been admiring this field guide all day, because it is entirely photographic, and does a lot to show birds from a variety of angles in a variety of settings. The Crossley field guide to Eastern Birds is a great new sort of reference book. The photographer/author uses lots of pictures of each species, photoshopped against a natural habitat, to give you a clear picture of each bird.

butterfly

Another fascinating field guide, this time about butterflies, was introduced to me by Lori Sheridan Wilson, island ecologist. Butterflies through Binoculars has more than just identification tips: it shows you what the host plants are for different butterflies, and explains when and where you are likely to find them.


And the third great find is Living Beaches of the Carolinas. This book has a treasure trove of information about the creatures you are likely to find in our tidepools. It’s a great reference for anyone who loves beachcombing and wonders about the shells and animals you find there!

Pluff Mud Perspectives reports on Spring Bird Count on Dewees

Posted on 2 CommentsPosted in Birds and Birding, CoastalMasterNaturalistsFeed

Check out this article from Cathy Miller about Dewees’ Spring bird count. You’ll find some fantastic photos as well.