24 December 2022

Early winter wildlife

 Winter is taking hold in the Northeast Kingdom. We just had a "bomb cyclone", although by the time it came to our neighborhood it had dissipated quite a bit, and only brought overnight snow. Our Red Fox celebrated the event by crossing our field again, carrying its christmas meal: a full chicken! (One of our neighbors is not going to be happy.) I've seen Snow Buntings down the road from the house, circling open fields in search of grass seeds on the snow. Pine Grosbeaks and Evening Grosbeaks have arrived from the north. A flock of Evenings is camped out up the road, and a few stopped at our feeder momentarily. But so far the star of the show for winter is an irruptive fruit eater from the north.

Bohemian Waxwing

Driving through town (St J) on errands, a large flock flew overhead, wheeled, and landed in the bare branches of a large tree. They have distinctive pointed wings, superficially like starlings, but if you can hear them above the traffic noise, there's no mistaking them.

Winter flock in a large tree
 The color is all wrong for starling, too: these are gray in front. Exercising patience in the bitter cold, I waited until they came down a bit closer.
Closer look. Gray breast, light brown rump, and a distinctive face pattern.
 
Even closer, feeding on fruit. Waxwings for sure.
A tail that looks dipped into a yellow paint can leaves no doubt that these are waxwings. Cedar Waxwings are common in the summer, but these didn't sound the same: there was no ultra-high-pitched squeal. The light brown color on the rump is the tell-tale sign that these are not the usual characters. Bohemian Waxwings are irruptive winter visitors. In northern Vermont, there are at least a few every year that are reported by birders. But the numbers are big in some winters, sometimes huge.
Bohemian Waxwing in fruit tree (crab apple?)
Both waxwings in North American are unaccountably stylish in their head pattern. What forces in evolution could lead to such flair? Wouldn't they still survive quite well with a more boring looking face patch? So much more to be understood.

 Irruption is a phenomenon exhibited by a modest number of birds. It's not known what the whole set of factors is for Bohemian Waxwings, but a common hypothesis is a reduced fruit crop up north.  The flock pictured here (at least 165, maybe close to 200) had already been spotted by other local birders, but I finally tracked them down and got photos. The brown rump and gray breast distinguishes Bohemian from Cedar. This was not a days long quest: they were at the grocery store. Seriously.
The Bohemian Waxwing is a bit dingier than Cedar when viewed from the front. But when one turned around (finally), I was rewarded with a view of crisp white wing patches and a startling yellow streak leading to the wingtip. Very nice, indeed. A good bird to check off for my Northeast Kingdom list.


 






30 November 2022

Wild Turkey

 Wild Turkey

I have had one year of full-time observations in Vermont now, and there is something gratifying about the abundance of Wild Turkeys in our neighborhood, and in this state in general. The Wild Turkey is an amazing creature: many times larger than the average bird, seemingly slow moving, it has the appearance of something that would not last long in the presence of predators. But the turkey has lots of tricks up its sleeve.



 

First of all, the Wild Turkey is a very capable flier. This is counter to the description often presented in the popular press. I have come across turkeys while walking in the woods and in the fields when, once they see my full figure, decide to escape to a safer position with a very quick beating of the wings, sometimes rising in the air quite high and quite swiftly.  Apparently many people assume such a large, fat creature, so often seen on the ground, must be like an ostrich or emu or rhea, which are birds with similar foraging habits that gave up flight eons ago. Not our bird: North America's forest-dwelling wolves and cats forced the turkey to stay flight-capable despite its girth.

Second, the Wild Turkey is a social bird. Large flocks, in any bird species, help them keep aware of predators and avoid the pounce of a coyote, mountain lion, or bobcat.  It is such a joy to see our local flocks, numbering typically about 15 in the summer, but congregating to 50 in the fall, and on occasion in a few hundred in winter.  It was great to have our flock of 13 come right into our backyard in late September and lounge on the lawn in mid morning.


The scene in our yard in late September

The Wild Turkey is supremely well adapted to the combination of forest and open farmland in Vermont. They are essentially omnivores, going for all kinds of seeds, nuts, and insects, raking through the leaf litter with impressively long claws, which double as weapons when a predator gets too close. Salamanders and snakes also get consumed.


In this depressing era of decline of wildlife populations, the Wild Turkey resurgence is something to celebrate. It was formerly a victim of the great deforestation that blighted the Vermont landscape in the late 1700s and early 1800s. Reportedly, three quarters of the state’s forests were leveled, a landscape so crudely and massively altered that turkeys disappeared nearly entirely. As forests finally recovered and the state’s agencies awoke from their slumber, the birds were reintroduced (in 1969) from stock taken in neighboring northern New York State. In 2022, recovery must be effectively complete, given the fact that it is difficult to take a drive in rural parts of the state without seeing a flock or two foraging in harvested fields in the fall.

Wild Turkeys have now adapted even to towns and cities. I saw one in a Boston residential neighborhood a few months ago. Homeowners are starting to use the term “pest.” But, as with the Red Fox, you have to admire their ability to adapt and succeed, even in strange environments. I would rather have Wild Turkeys in urban parks than Rock Pigeons and Starlings that don’t belong.

Tracks in the snow. Seen in New Mexico, where the species has also come back successfully.


 
A group trotting through farmland down the road 

22 November 2022

 Red Fox

We've been enjoying views of our local Red Fox for about the last year.  We must have one territorial pair, because they romp around in our fields with a lot of confidence, curling up for naps even out in the open. (We see only one at a time, though.) We've watched them mousing in the snowy fields. Today (late November), we watched the fox in a showdown with three White-tailed Deer.  The deer approached, stared, and the fox got up from its nap, stretched, and trotted off, after the deer passed within about 30 yards or so. Neither poses a real threat to the other.


Just like a canine, circling before settling in for a nap.

There's a bit of controversy surrounding the Red Fox that I find interesting. Some authorities (e.g. Vermont Fish and Wildlife) consider the creature to be introduced. The Gray Fox, smaller and more delicate (amazingly, a tree climber), and likely more stealthy, is native to the area. The motivation  for the introduction was to provide an animal exciting to hunt; so people experienced in hunting Red Foxes in Great Britain pushed to have them wandering the Vermont forests and fields.

The story seems logical, but leaves me with some doubt. As with birds, how much do we really know about pre-settlement wildlife? The early settlers didn't keep extensive records of what they saw: they were, understandably, preoccupied with surviving in an unforgiving landscape. They blasted away at wildlife for meat. The animals easy to find were the first to fall victim to human hunger. Is it possible the the Red Fox was here and then extirpated by settlers? (It could have suffered a range retraction to the north and west, where it graces the landscape today.) Today, the Red Fox seems so comfortable in its Vermont surroundings that one wonders if it has a niche, after all. It seems at least remotely possible that the "reintroduction" simply expanded on a natural recolonization of formerly occupied habitat.


 

05 October 2022

 Autumn Colors

September and October in Vermont bring reminders that chemistry (and biochemistry) have some dramatic consequences for the visual landscape. As temperatures drop, the trees decide that it's best to shutdown the chlorophyll factory for the year. Chlorophyll contains those wonders of natural synthesis, metallo-porphyrins, which are the heart of the photosynthetic engines that capture atmospheric CO2 and produce organic matter in copious quantities. But chlorophyll only survives for a short time in the leaf of the tree -- sunlight drives photosynthesis, but causes it to be decomposed after weeks and months. So the trees must constantly remake it through the summer. In late September, chlorophyll production ends and the other components of the leave dominate: anthocyanins (good absorbers in the blue, reflectors in the red) and beta-carotene (yellow reflectance) remain in the drying leaf. The roles of these latter two are not fully understood in the processes of the leaf, but at least in part, anthocyanins absorb the bluer parts of the sunlight to reduce the amount of photolysis of the chlorophyll -- they are protectors. (Ref.: American Scientist vol. 90 p. 524, 2002, Why Leaves Turn Red.)

Here are some examples from the Northeast Kingdom.

Leaf color in Danville. Maples, birches, beech, ash, hemlock, and more.



Late afternoon in Steam Mill Brook
 Wildlife Management Area, Vermont


Danville in late September

14 September 2022

Brazil, July - August 2022: Pantanal

 

Rufous-tailed Jacamar, Southwild Pantanal

We had a fantastic trip to Brazil in late July and early August. We joined a group led by Mark Pretti Nature Tours, visiting four places in the state of Mato Grosso. We saw about 400 species of birds, numerous mammals, and a few butterflies and dragonflies. Mark knows a thing or two about Brazilian bird sounds.

1. Southwild Pantanal (formerly Fazenda Santa Tereza). A great lodge deep in the Pantanal, just off the Transpantaneira road, with trails in the forest, boat trips on the Rio Pixaim, and a day trip to Porto Jofre for riverboat trips.

2. Pousada Piuval. A resort off of Transpantaneira road, with manicured lawns and a pool, but surrounded by Pantanal forest and lagoons.

3. Cristalino Lodge. An amazing lodge in the southern Amazon rainforest. Canopy towers, river boat trips, forest trails. And antbirds!!

4. Pousada do Parque. Beautiful lodge situated in the Chapada dos Guimaräes National Park. Forest trails, day trips to undisturbed Cerrado habitat and rainforest. And a 5-star chef.


Southwild Pantanal and Transpantaneira Road

Some of these shots are from the bumpy dirt road between the city of Cuiabá and the lodge at Santa Tereza (Southwild Pantanal), called the Transpantaneira Road. (A half-baked attempt by the government to get traffic into the Pantanal.) Others are from boat trips on the Rio Pixaim, starting from the lodge. A few are from the southern portion of the Transpantaneira road. Highlights included an Ocelot (coming in to a night-time feeding station), a Sungrebe, and an Agami Heron.




Another colorful sunset at Santa Tereza




Amazon Kingfisher

Bare-faced Currasow

Black-backed Water Tyrant

Black-capped Donacobius

Black-collared Hawk. A very colorful
and impressive raptor of the Pantanal.



Blue-throated Piping Guan.
They like to perch on high tree
branches overlooking the river

Brown Capuchin monkey


Capybara, adult and young

Capybara with Cattle Tyrants.
One in our group suggested a name
change to Capybara Tyrant.

Choco Chachalaca at the lodge

Cocoi Heron

Crab-eating Fox at the lodge, in the flashlight.
He was fairly tame and lounged near the restaurant.
Mato Grosso Snouted Tree Frog,
on the lodge wall
Beaked Frog sp


Crested Caracara

Crane Hawk


Gray-cowled Wood-rail
Yacare Caiman

Hyacinth Macaw. You have to see them
 to believe them.
Hyacinth Macaw
Green Iguana
Greater Rhea

Greater Thornbird


Large-billed Tern

Lesser Kiskadee

Marsh Deer

Marsh Deer

Monk Parakeet.
Large flocks frequent the lodge. So nice
to see this where it actually belongs!

Narrow-billed Woodcreeper. The only 
woodcreeper in open habitat.

Neotropical Cormorant

Ocelot. Incredibly rare; we had one at a
feeding station at the lodge.

Ocelot
Saffron Finch
Rufous-tailed Jacamar. This bird was
incredibly accommodating beside
the trail, allowing frame-filling shots.
Rufescent Tiger-heron. Incredible patterning.
Roadside Hawk
Ringed Kingfisher
Paraguayan Caiman Lizard

Orange-backed Troupial. Astounding
colors on this creature.
Transpantaneira Road: the state of the
bridges raised questions about the
regional highway department



Savanna Hawk

Scarlet-headed Blackbird

Snail Kite

Snail Kite, immature

Solitary Black Cacique

Southern Screamers. Huge birds that we saw
in several spots beside the Transpantaneira,
in open country. One wonders
what they do in the wet season.

Sunset at Southwild
Veined Tree Frog

White-headed Marsh Tyrant

Wattled Jacana

Sungrebe. Finally got one, on the Rio Pixaim!
Mark pointed out the striped feet.


White-rumped Monjita

Yellow-collared Macaws