HART BEAT: FLORIDA'S WINTERING WARBLERS

Palm Warbler

Palm Warbler

Sadly, Florida is not a great place to go warbler watching in the winter. Warblers in the winter in Florida are in their basic, drab, “don’t care about courting or attracting a mate,” curl up by the fire in comfort, couldn’t care less plumage. And most birders would rather wait to see them on their spring march north to their summer breeding territories when they have morphed into spectacular “check me out, I’m so pretty” mating plumage. Nevertheless, Florida’s winter warblers are still fun to see and check out.

By far, the most common warbler in Florida in the winter is the ubiquitous Palm Warbler, (top of page) busily pumping its tail in shrubbery around virtually every home in Florida, but also seen out in the country-side, in farm fields, edges of swamps, along marshes, just about everywhere. While they are pretty plain all winter long it is interesting to watch them begin to get some of their breeding color late in March when they are about to begin their northward migration.

The second most common winter warbler in Florida is the Yellow-rumped warbler (photo 2) which can be seen flashing its “butter butt” in just about any suitable habitat: woods edges, marshes, road-sides, but less likely to be seen in residential shrubbery. And the third most common of our Florida winter warblers is the Common Yellowthroat. (photo 3) However, birders have to go looking for these more secretive birds, as they are found primarily in marshes and along woods edges. Finally, the fourth most common winter warbler in Florida is the Pine Warbler (photo 4) which can be found in virtually any significant patch of pines almost anywhere in south Florida, and along with the Common Yellowthroat, the only year-round residents of southern Florida. Curiously, their plumage does not change much throughout the year.

The less common but definitely fun to find Florida winter warblers are the Black and White Warbler (photo 5); the Northern Parula (photo 6); the Prairie Warbler (photo 7); the Yellow-throated Warbler (photo 8); and the Ovenbird (photo 9). All of my photos displayed in this column were taken in the winter in Florida although I have better photos of some of these birds taken up north when they were migrating or had already reached their breeding grounds.

Birding field guides indicate that Orange-crowned Warblers, American Redstart and Northern Waterthrushes also winter in Florida, and I do have poor photos of the Orange-crowned and Redstarts, but must confess that I have not seen a Northern Waterthrush in Florida. Black and White, Northern Parula and Prairie Warblers are found in appropriate woodlots or places like Green Cay, Wakodahatchee or Merritt Island NWR, but Yellow-throated Warblers and Ovenbirds can sometimes be found visiting bird feeders.

Speaking of Green Cay and Wakodahatchee, both located in Boynton Beach about a mile apart, all 10 warblers featured here we have either seen there, or in the case of Ovenbird, have been reported there. Periodically, other warblers are spotted throughout Florida in the winter, but they are either very early migrants or birds that for one reason or another did not continue on their south bound migration. Such birds, when found, are reported on the rare bird or rarities internet pages. As I am writing this column Yellow-breasted Chat reports have come in on rare bird lists from two different locations in central Florida.

While warbler watching is not a prime Florida birding activity in the winter time it does pick up for a brief period in late March and early April when some of the other warblers pass through Florida on their trip north. Unfortunately these passing transients are catch-as-you-can for they are on the move and therefore generally one- or two-day birds at the most, then gone, moving on.

I suppose winter warblers in Florida could be characterized as true “Snow Birds,” certainly more so than all those winter migrants from northern states and Canada who clog the highways and byways of Florida and make for long wait times in all the restaurants that the locals avoid while waiting for their northern friends to leave in the spring. Unfortunately we have no way of asking the local bird species what their reaction is to the winter influx, not only of warblers, but all other kinds of bird species that invade Florida in the winter. One wonders whether the local birds get sick of all these short term avian visitors who don’t add a thing to local bird well-being, for they don’t even hang around to provide potential mating partners, and unlike human “Snow Birds,” true snow birds don’t even pump up the local economy.

I can’t imagine a local bird looking at some of its northern true snow birds and saying, “At least their contributions here enable me to get through the summer.” At least the true “Snow Birds” do add joy and pleasure to the human snow bird birders who have the opportunity to see how they pass their winter, probably visiting family and friends and meeting new acquaintances from many other new and different areas “up north.” Probably already planning northern summer reunions, I wouldn’t be surprised.

For more on Florida’s winter warblers, see: www2.stetson.edu/~pmay/emeralda/emaral19.htm, and www.10000birds.com/winter-wood-warblers-in-southeast-florida.htm.

HART BEAT: THE GRAY GHOST -- NORTHERN HARRIER

Male Northern Harrier

I was recently asked, “When was the last time you saw a Gray Ghost?”

The question, from a birder I did not know and had just met, had a two-point challenge to it: first, to see if I knew what the Gray Ghost was and second, to see if I was aware of how uncommon a bird it is to see. Fortunately, I have long known the Gray Ghost is the male Northern Harrier (photo 1), and I have also long been keenly conscious that sighting one is a truly exciting and uncommon birding experience. (above) Curiously it does seem that 90 percent of the Northern Harriers one sees out in the field are either juveniles of either sex, or adult females. In fact, seeing an adult male sitting in a field is an even more uncommon experience. (photo 2)

I’m sorry, dear Reader, but my research with Mr. Google did not produce a reason for this apparent discrepancy of why adult females should be more common than adult males in a species, but the research did disclose that male Harriers may breed with two or more females, and I suppose that could possibly be an unstated explanation.

However, there is no question, adult males and adult females are easy to distinguish. Males are a distinctive gray above and white below with a gray owl-like face, while females, as in so many bird species where the female is the egg layer, nest sitter, and baby raiser, are a more nondescript and less conspicuous ground blending brown above and below, with some white on the underside. (photo 3) Both, as well as juveniles, have white rump patches which are quite distinctive when they are seen soaring low over the ground searching for mice, voles, snakes, lizards, frogs and toads, grasshoppers, and sometimes even small birds. Northern Harriers have long legs, adapted for reaching into long grass for prey. With their owl-like facial pattern they are able to hunt for food by sound as well as eyesight, although all their hunting is in the daytime.

Both male and female juvenile Harriers look alike and are therefore indistinguishable. I always thought all juveniles and adult females were also indistinguishable, however, in researching for this column I have learned that adults, both male and female, have yellow eyes, while all juveniles have brown eyes. (photo 4, juvenile)

In addition, juveniles have small white tufts of feathers on the forehead and a little more white around the eyes than adult females. These features are visible in photo 4 as compared to photo 3. Even on a gray day in light rain a juvenile Northern Harrier cruising over a marsh can be a very pleasing sight. (photo 5)

We humans certainly have a fascination with ghosts. There have been movies and television shows about ghosts, searching for them, finding them, being frightened by them and any number of ways we think we might be affected by them. As for birds, the long lost Ivory-billed Woodpecker is often referred to as the “Ghost Bird” as there have been unverified alleged sightings of one or more over recent past years; the Screech Owl is sometimes referred to as the “Ghost Owl” and other owls with their ethereal night calls and “now you see them, now you don’t ways” are occasionally thought of in ghostly terms. And Google even has a web page for “Images for birds described as ghosts.”

But the Northern Harrier male, the Gray Ghost, is the most enduring, descriptive and real reference to a day-time ghost that actually exists, albeit uncommonly seen. So, when you are out in open country passing farmer’s fields keep your eyes open for Northern Harriers and particularly the Gray Ghost. Maybe you can return home and tell your friends that you did indeed see a ghost - a real, existing, for sure, Gray Ghost.

For more on Northern Harriers, see https://www.audubon.org/field-guide/bird/northern-harrier. For more on human our fascination with ghosts, see: https://www.ghostsandgravestones.com/believe-in-ghosts.

HART BEAT: NATURE'S CLEAN-UP CREW

A Turkey Vulture and a Black Vulture ignore pecking order and share

Can you imagine a world where all the animals, birds, fish and the like, dying in fields, forests, lakeshores, beaches, on our highways and by-ways, and anywhere and everywhere else they may find to finally end their life’s adventure, were to remain, rotting, putrid and stinking, in their final unburied resting place until temperature, humidity, and natural decomposition succeeded in disposing of them? We should thank heaven every day for all those scavengers that do that job for us. Yes, thank heaven for those homely vultures we see soaring high over-head all day long, constantly searching and giving us reason to “Look alive!” 

On a recent trip to Joe Overstreet Road, a premier Florida birding destination through farm country to the shores of Lake Kissimmee, we observed a dead cow in an adjoining field already in the process of disposal by a good number of vultures. This particular sighting was of unusual interest because a Turkey Vulture (red head) and a Black Vulture (black head) were standing side by side on top of the carcass. Bird scavengers have a definite pecking order: 10 Turkey Vultures will step back and patiently wait out one lone Black Vulture; 10 Turkey Vultures and 10 Black Vultures will step back and wait out one lone and smaller Crested Caracara (photo 2); and if a Bald Eagle or two show up, all other scavengers will back off until the Eagles are finished, although the Eagle may occasionally have to assert its dominance to a pushy Black Vulture. (photo 3).

One does not normally think of a fish-eating Eagle as a scavenger, but we have often seen eagles on animal remains, as well as harassing Ospreys to steal their hard-won fish meals. These were the reasons Benjamin Franklin gave in denigrating the scavenging thieving Bald Eagle as America’s national symbol when he favored the “much more respectable” Wild Turkey.

We have seen Black Vultures just preparing to start work on a fresh road-killed Wild Hog (photo 4) realizing that without beaks for tearing flesh like hawks and eagles, they would have to find a way to break through the hide of the animal for we could not see any break in its skin from the vehicle impact. I then remembered a Florida farmer friend informing me that he had watched Black Vultures actually attack a dying calf to hasten its demise so that they could feast.

Turkey Vultures have the ability to strip a carcass clean leaving the bare bones for other predators, such as coyotes and foxes that can break the bones to get to the marrow. (photo 5) Both species of vultures have featherless heads because of their propensity to dig into bloody carcasses. Thus, they don’t have to worry about getting a lot of sticky gooey blood on their head feathers.

Turkey Vultures have much more highly developed olfactory senses and are better able to find well-hidden carrion than their Black cousins. Hence, Black Vultures will often follow Turkey Vultures hoping they will lead them to their next meal. In the air the two species may appear quite similar, but when seen in close proximity there are significant differences in their flight profiles as seen in photo 6.

Finally, both species of Vultures are able to eat rotting carrion because they have stomach bacteria that enable them to eat such fare that would make virtually all other creatures, animal or avian, quite sick. A friend who just returned from the west coast of Florida reported watching thousands of Vultures feasting on rotting fish killed by the red tide and washed up on pristine Gulf coast beaches while simply smelling the toxic red tide made many humans ill.

The much less common Crested Caracara is a sought after attractive prized bird find for our birding friends from “up North.” And while quite a beautiful bird, like the Bald Eagle, it is still just a scavenger. (photo 7) In fact, when seen carrying a dead fish carcass with no apparent nutritional value (photo 8) one wonders about the incongruity of such a beautiful bird in such a degrading circumstance.

Out west and farther north the Common Raven (photo 9) is often found on carrion along with the vultures and occasional eagles. Ravens are not found in Florida, but in recent years they have moved south into the Mid-Atlantic States and, who knows, they may eventually find their way to Florida as many other “Snow-birds” have.

While we humans have developed sometimes elaborate methods for disposing of our deceased comrades, from pyramids to crypts to graveyards with massive headstones to crematoriums, the poor animal suffering a losing battle with a speeding semi remains in its final resting place until nature’s clean-up crew comes to take care of it.

Caricatures of undertakers over the years have made them appear almost vulture-like. Perhaps that is not accidental, but it certainly gives vultures a bad image considering what tremendous benefits vultures provide for us. Then again, I guess it is appropriate since vultures are almost exclusively associated with death. While never a happy subject, final remains do indeed need to be disposed.

I don’t for the life of me know why I chose this topic just before Christmas, one of the happiest times of the year. Next year perhaps I will do a column on nests and baby birds. Oh yeah!!

For more on Ben Franklin’s thoughts on America’s Great Seal: https://greatseal.com/symbols/turkey.html. Why vultures can eat rotting flesh: https://www.livescience.com/48899-vultures-bacteria-microbiome.html