Tuesday, April 5, 2016

Florida: Odds and Ends

Scarlet Hibiscus (Hibiscus coccineus)
South Florida may be the easiest place in the world to watch, or photograph, wildlife. As I'm sure my posts demonstrate, anyone can take good wildlife pictures in Florida. One of the consequences of this is that when I try to organize photos from any one of my visits there into a series of reasonably coherent blog entries, I end up with a lot left over. Our May 2014 visit was no exception, and this is a post devoted to its leftovers. That includes this portrait of the native Scarlet Hibiscus (Hibiscus coccineus) growing at the Pondhawk Natural Area in Boca Raton; I couldn't fit it in anywhere else. 

Blue Jay (Cyanocitta cristata)
You might not realize it from my other Florida entries, but we spend lot of our time in Florida hanging out at my mother's winter home (indeed, Mom is the main reason we go to Florida in the first place). There is a feeder in her back yard, so if we have nowhere else to go I can always watch our avian (and mammalian) visitors. Blue Jays (Cyanocitta cristata) are regulars.

Common Grackle (Quiscalus quiscalus)
So are Common Grackles (Quiscalus quiscula).

White-winged Dove (Zenaida asiatica)
A White-winged Dove (Zenaida asiatica) drops by more or less every day.

Eastern Grey Squirrel (Sciurus carolinensis)
Mammals in the back yard have even included, on one memorable occasion, an otter, but Eastern Grey Squirrels (Sciurus carolinensis) are far more likely.

Northern Mockingbird (Mimus polyglottos)
Northern Mockingbird (Mimus polyglottos)
Northern Mockingbird (Mimus polyglottos)
This young Northern Mockingbird (Mimus polyglottos), begging for food on the back lawn, was obviously not long out of the nest.

Other than my mother's back yard, there are a number of more or less natural areas in the Boca Raton area. They include this bit of palmetto scrub; Eileen and I checked it out but didn't see very much (though it is supposed to hold Gopher Tortoises (Gopherus polyphemus), a species I continue to find elusive). I presume any tortoises in the area retreat into their burrows as soon as I decide to go looking for them.

Loggerhead Shrike (Lanius ludovicianus)
Boca Raton is the home of the University of South Florida, and the campus is in turn host to some interesting open-country birds. These include increasingly-uncommon native species such as Loggerhead Shrike (Lanius ludovicianus)...

Nanday Parakeet (Aratinga nenday)
....and colorful exotics like this Nanday Parakeet (Aratinga nenday), a bird that by rights ought to be confined to its native range in South America.

Burrowing Owl (Athene cunicularia)
Chiefly, though, the campus is a refuge for a colony of Burrowing Owls (Athene cunicularia). You're not allowed to disturb them, of course, but they are easily seen from the roadside.  Just look for a little brown lump on top of a pole, surveying its surroundings with an expression of supercilious disdain.

Least Sandpiper (Calidris minutilla)
One of the more productive natural areas in Boca is Pondhawk, though how much you can see there depends very much on how much water there is in its central pond. On our May 2014 visit it was pretty dry, but there was enough water in the canal bordering the area to draw in a few shorebirds. These are Least Sandpipers (Calidris minutilla), probably the commonest mud-haunting sandpiper in North America...

Semipalmated Plover (Charadrius semipalmatus)
...and here, foraging near the sandpipers, is a Semipalmated Plover (Charadrius semipalmatus). This is the North American equivalent of the Ringed Plover (C. hiaticula) of the Old World; it owes its unlovely English (and Latin) name to its partially-webbed toes, one of the differences between the two species.

Corn Snake (Elaphe guttata guttata)
Even when dry, though, Pondhawk can be a good place for reptiles. I found this handsome Corn Snake (Elaphe guttata guttata) at the entrance.

American Alligator (Alligator mississipiensis)
American Alligator (Alligator mississipiensis)
The best places near Boca Raton to see, and photograph, the most wildlife with the least effort remain the Green Cay and Wakodahatchee Wetlands areas in Delray, with their permanent (and artificially-controlled) water levels and excellently-maintained boardwalks. To keep with reptiles for the moment, here are always American Alligators (Alligator mississipiensis) there.

Florida Soft-shelled Turtle (Apalone ferox)
Florida Soft-shelled Turtles (Apalone feroxare common and easy to see as they swim around under the boardwalks.

Peninsula Cooter (Pseudemys peninsularis)
This, though, was a surprise. Florida Red-bellied Turtles (Pseudemys nelsoni) are abundant at both refuges. This, however, is a Peninsula Cooter (Pseudemys peninsularis), a very similar species that I had never seen previously at either refuge. Notice the "hairpin" yellow markings behind the eyes, a distinct feature of this species. I knew that Peninsula Cooters were in the area (I had seen them before at the Daggerwing Nature Center in Boca Raton), but had always wondered why they seed to avoid Wakodahatchee and Green Cay (where I photographed this one). Well, here it is; has the species always been there, or was this a wanderer - perhaps a female looking for a place to lay her eggs?

Wood Stork (Mycteria americana)
Birds, of course, remain the most obvious animals of any size (other than strolling humans) that you can see from the boardwalks.  They range from one of the largest North American birds, the Wood Stork (Mycteria americana)...

Red-winged Blackbird (Agelaius phoeniceus)
...to a variety of songbirds.  Among the most obvious are male Red-winged Blackbirds (Agelaius phoeniceus) challenging rivals from a perch on the boardwalk handrails.

Black-bellied Whistling-duck (Dendrocygna autumnalis)
A fairly recent arrival, and one of the more spectacular birds in the area - especially in flight - is the Black-bellied Whistling-duck (Dendrocygna autumnalis).

Anhinga (Anhinga anhinga)
Anhinga (Anhinga anhinga)
Anhinga (Anhinga anhinga)
Anhingas (Anhinga anhinga) are diligent and expert fish-catchers.  An Anhinga's biggest problem, after successfully spearing a fish with its bill, is transferring it, headfirst, from bill to throat - an action usually accomplished with a toss of the head and an expert catch.

Double-crested Cormorant (Phalacrocorax auritus)
Double-crested Cormorants (Phalacrocorax auritus) are probably the most maligned birds in North America (I have seen them referred to as 'feathered rats', among other things), but an adult, with glossy black plumage, bright orange throat skin and piercing blue eyes, is a lovely creature.

Purple Gallinule (Porphyrio martinicus)
Purple Gallinule (Porphyrio martinicus)
For sheer glamour, of course, even the cormorant can't beat the Purple Gallinule (Porphyrio martinicus).

Purple Gallinule (Porphyrio martinicus)
Purple Gallinule (Porphyrio martinicus)
Purple Gallinule (Porphyrio martinicus)
Purple Gallinules are largely vegetarian.  At Wakodahatchee they are particularly fond of the budding flower heads of Fireflag (Thalia geniculata), and will go to considerable lengths to get them (for a rail, they seem remarkably agile).

Cattle Egret (Bubulcus ibis)
Cattle Egret (Bubulcus ibis)
Dominating the water-bird fauna, of course, are the herons.  The upper photo is of a fully-fledged immature Cattle Egret (Bubulcus ibis), with an adult in breeding plumage below it.  Cattle Egrets are so abundant in Florida that it is hard to believe that up until the 1950s they were completely unknown here.   The Cattle Egret is one of the comparatively rare cases of a recent natural arrival (apparently from Africa by a South America, where birds first appeared earlier in the 20th century).

Great Blue Heron (Ardea herodias)
Great Blue Heron (Ardea herodias)
Great Blue Heron (Ardea herodias)
Great Blue Herons (Ardea herodias), the largest heron in the area, are also the least exotic (for a Canadian birder) as their range extends well north of the border.

Great Blue Heron (Ardea herodias)
 However, in Ontario – where the birds tend to nest at the tops of tall trees – you rarely have a chance to get an eye-level view of a recently-fledged bird, like this one.

Little Blue Heron (Egretta caerulea)
Little Blue Heron (Egretta caerulea) 
 Despite its name, the Little Blue Heron (Egretta caerulea) is actually closer to the egrets, and although adults like this one live up to their name, their immatures are white.

Least Bittern (Ixobrychus exilis)
 Certainly the most exciting heron on the wetlands is also, oddly enough, the smallest of the lot: the Least Bittern (Ixobrychus exilis).   Least Bitterns are notoriously shy creatures, although like so many other birds is much easier to get on close terms with them in South Florida than in the northern parts of their range.  A sighting of a Least Bittern in Canada is a red-letter occasion, but here – though they are still skulkers – they are much easier to see.

Least Bittern (Ixobrychus exilis)Least Bittern (Ixobrychus exilis)
 In fact, you can get very close to them, though you may have to peer carefully into the reeds to do so.

Least Bittern (Ixobrychus exilis)
 Least Bitterns even nest close to the boardwalk at Green Cay. Many birders even get to see their downy young following their parents about, though I have never had the good fortune to do so.

Least Bittern (Ixobrychus exilis)
Least Bittern (Ixobrychus exilis)
However, to come back to the point I made at the beginning of this posting,  these photos of a Least Bittern on the nest may be the best proof I have that anyone in South Florida can be a good wildlife photographer. There can't be many places where you can get photographs like this without having to resort to a blind and outfit yourself with a pair of hip waders. All you have to do at Green Cay is to lean over the boardwalk rail, point your camera, and click the shutter.

Friday, April 1, 2016

Florida: Daggerwing Dragons

The boardwalk at the Daggerwing Nature Center in west Boca Raton passes over a small waterway and through a regenerating forest of baldcypress and pond apple. Once there was a grove of strangler fig here, long since utterly demolished by Hurricane Andrew.  Daggerwing can be a good place for dragonflies, though I confess that the title of this post has as much to do with my fondness for alliteration as with the locale.

Blue Dasher (Pachydiplax longipennis)
Blue Dasher (Pachydiplax longipennis)
Blue Dasher (Pachydiplax longipennis)
We start, then, with a few dragonflies from the more open marshlands at Green Cay and Wakodahatchee in Delray, all photographed in May 2014. This is the ubiquitous Blue Dasher (Pachydiplax longipennis).

Halloween Pennant (Celithemis eponina)
Halloween Pennant (Celithemis eponina)
Perhaps the most attractive south Florida dragonfly (it actually ranges north to southern Ontario, though I have never seen one there) is the Halloween Pennant (Celithemis eponina). Like the Rhyothemis dragonflies of the Old World,  Celithemis species boast heavily-marked, butterfly-like wing patterns; this one is surely named for its orange tint, which recalls (I suppose) a Halloween pumpkin.

Pin-tailed Pondhawk (Erythemis plebeja)
Pin-tailed Pondhawk (Erythemis plebeja)
Pin-tailed Pondhawk (Erythemis plebeja)
The Pin-tailed Pondhawk (Erythemis plebeja) is an easily-recognized Florida specialty (it also ranges from southern Texas to Argentina). It can be rather shy, and that (coupled with its largely black coloration) can make it tricky to get a photo that shows much detail. These, though far from perfect, are some of my better efforts.

Rambur's Forktail (Ischnura ramburii)
Rambur's Forktail (Ischnura ramburii) is the most obvious of the local damselflies. Though it does not reach as far north as the Halloween Pennant, it is a wide-ranging species, found throughout the West Indies and as far south as Chile. This is an adult male. This species, by the way, is named after the same Rambur that gave his name to a common Sarawak dragonfly, Neurothemis ramburii, a species I have often featured here. Jules Pierre Rambur (1801-1870) was a French entomologist who described a great many insects, dragonflies included.

Baldcypress (Taxodium distichum)
Baldcypress (Taxodium distichum)
My actual visit to Daggerwing, at least on this trip, was on May 18, 2014.  As I mentioned above, though this was once s fig forest it is now dominated by two quite different species. One is a conifer, the Baldcypress (Taxodium distichum) - a tree that has been around in more or less its present form since the days of the dinosaurs. Unlike most conifers, it is deciduous, and these trees are sporting their fresh spring foliage as well as a new generation of cones.

Pond Apple (Annona glabra)
Pond Apple (Annona glabra)
Pond Apple (Annona glabra), on the other hand, is a flowering tree, a member of the custard apple family (Annonaceae).

Pond Apple (Annona glabra) Pond Apple (Annona glabra)
Like other members of its family, it produces an edible fruit. I have never tried one, but I am particularly fond of its  commercially-grown cousins, sweetsop, soursop and custard apple. The Pond Apple fruit bears a definite family resemblance to its tasty relations.

White Peacock (Anartia jatrophae)
Daggerwing (as its name implies) is particularly devoted to butterflies. Here are two common ones: the White Peacock (Anartia jatrophae)...

Zebra Longwing (Heliconius charithonia)
...and the Zebra Longwing (Heliconius charithonia). Longwings, of which this is the only Florida example, are fascinating insects. Many tropical species are close mimics of each other, evolving differing mimicry patterns in various parts of their range. They have been the subject of a great deal of research into their behaviour, genetics, evolution and life history (consider this a plug for my book Butterflies, which describes this in more detail), and are popular attractions in butterfly gardens worldwide. Adults, unlike most other butterflies, can take up protein from flower pollen, and may live for many months as a result. Here's a quote from the book:

"Some male Heliconius longwings are child molesters. In over 40% of Heliconius species, males hunt for female pupae on their larval food plants. They may home in on chemicals released by the chrysalis at the end of her de-velopment. Zebra Longwings (H. charithonia) also search by sight, focusing on plants that show larval damage. In-dividual males perch on and guard any female chrysalis they find, or groups of males may cluster around, waiting for the female to emerge. As soon as she appears, the males jostle each other for position, often copulating with her before she is completely out of her pupal skin. Other species do not wait even that long, breaking into the chrysalis and copulating with the female as soon as they can reach her genitalia. This seemingly abusive behavior may prevent copulation with extremely similar mimics. Where similar species occur together, one may be a pupa molester while the other may not; the difference may lower the likelihood of interspecific mistakes."

The little stream you pass over on the way to the forest is worth a look. You never can tell what might emerge from the pondweed.

Spotted Tilapia (Tilapia mariae)
Some of what you will see doesn't belong there - hardly a surprise in South Florida, which probably has one of the highest concentrations of alien exotics on the planet. These Spotted Tilapia (Tilapia mariae) properly belong in the waters of West Africa, but they have been swimming in Florida since at least 1974. It has done extremely well, and is now the dominant fish in many areas (probably to the detriment of less aggressive native species).

Florida Soft-shelled Turtle (Apalone ferox)
Florida Soft-shelled Turtle (Apalone ferox)
Florida Soft-shelled Turtle (Apalone ferox)
The Florida Soft-shelled Turtle (Apalone ferox) certainly does belong here - indeed, it is pretty much confined to the American southeast. This seems to be a young animal; the yellow stripes on its head will fade with age. 

Eastern Pondhawk (Erythemis simplicicollis)
Eastern Pondhawk (Erythemis simplicicollis)
Finally, here are some actual Daggerwing dragonflies. This is a male Eastern Pondhawk (Erythemis simplicicollis), a wide-ranging species that, like the Blue Dasher, is also common in Ontario. 

Needham's Skimmer (Libellula needhami)
Needham's Skimmer (Libellula needhami)
Needham's Skimmer (Libellula needhami) is s much more restricted-range species, at least in the United States where it is confined to near-coastal areas along the eastern seaboard and the Gulf of Mexico. These are females.

Four-spotted Pennant (Brachymesia gravida)
Four-spotted Pennant (Brachymesia gravida)
Four-spotted Pennant (Brachymesia gravida)
The dragonfly that caught my eye, though, on my May 2014 visit to Daggerwing was the Four-spotted Pennant (Brachymesia gravida). I have often been to Daggerwing on past Florida visits, though admittedly usually in autumn or winter, but I do not recall seeing it there before. 

Four-spotted Pennant (Brachymesia gravida)
This time, though, it was not simply present; it was there in swarms, particularly in more open, reedy marshside areas. If I stood with my camera in the right patch of reeds, all I had to do to see one (or lots of them) was look up. According to Dennis Paulson's indespensable Dragonflies and Damselflies of the East, these dragonflies can reach "prodigous densities" on large open lakes.  There were certainly a lot of them about.

Four-spotted Pennant (Brachymesia gravida) Four-spotted Pennant (Brachymesia gravida)
Four-spotted Pennant (Brachymesia gravida)
Females (and immature males) have paler wing patches from males, but share distinctive (and, in the American southeast, unique) white pterostigmas, clearly displayed in these photos.

Four-spotted Pennant (Brachymesia gravida)
Four-spotted Pennant (Brachymesia gravida)
Four-spotted Pennant (Brachymesia gravida)
These individuals are all females.

Four-spotted Pennant (Brachymesia gravida)
Four-spotted Pennant (Brachymesia gravida)
I have more, and closer, photos of females than of males, probably because when they they perch in a reedbed they tend to stay on the less windy, inshore side (according to Giff Beaton's excellent Dragonflies and Damselflies of Georgia and the Southeast).  Males prefer the watery side of the reeds, and fly about more.  I'm afraid that, though a dragonfly fancier, I tend to be reluctant to get my feet wet (or to deposit myself, and more particularly my camera, in the mud).