Biking around Bielowieza

The best way to see the forest and prairie scenery in Bielowieza is to grab bikes and tour the countryside.  Many roads to some of the small villages are less traveled by car and perfect for birding bikers.  Here are a few of the things we saw.

House in the village of Teremiski

 Farm House in the village of Teremiski

Forest road near Bielowieza

Forest road near Bielowieza

Prairie near Bielowieza

Prairie near Bielowieza, patch of a kind of thistle ?

Prairie orchid, Bielowieza prairie

A rare Prairie orchid, Bielowieza prairie

Lunch stop, farm museum, Budy

Lunch stop, farm museum, Budy

Kvass with bread and cheese

Kvass (beer made from fermented rye bread) with bread and cheese

Red deer stag, bison reserve, Bielowieza, Poland

Red deer stag, bison reserve, Bielowieza,

Wild European horse, like the extinct tarpan

Wild Eurasian horse, similar to the extinct tarpan, at the bison reserve. Tarpan went extinct in the early 1900s, but breeding experiments attempt to restore this ancient horse lineage.

Roe deer fawn

Tiny Roe deer fawn is dwarfed by the tall grass in its pen at the bison reserve near Bielowieza.

the wisent isn’t extinct…completely

The Wisent, or European bison, is a look-alike of the American bison, but its genetics tell a different story.

Wisent, European forest bison

Wisent, European forest bison, is really a grassland animal that takes refuge in the forest.

As the story goes, once upon a time between ice ages, steppe bison wandered the grasslands of Europe, Asia, and North America, traversing the Bering land bridge during glaciated times.  Cut off from Asia when sea levels rose, the steppe bison in North America underwent moderate changes to become the buffalo we recognize today, but then suffered huge declines in numbers when railroads through the central plains brought hunters that killed off huge numbers of them.

American bison

American bison in Wyoming

The steppe bison was also hunted extensively, and may have gone extinct from overhunting about 11,000 years ago.  But aurochs (European progenitor of cattle) and Steppe bison matings in Europe produced hybrids (now known as Wisent) that survived the hunting pressure, perhaps by retreating deep into the primeval forest.
European bison, Wisent

Wisent numbers also declined precipitously with settlement and expansion of agriculture in Europe, but a few remained in the small forest fragments, like the one near Bielowieza.

European bison, Wisent

Hybrids usually are less fit than their ancestors, largely because they are less fertile (e.g., mules), but in the case of the European bison hybrid, they appear to have survived both hunting pressure and the extreme cold of the interglacial periods better than their steppe bison ancestors, and retreated to the forest for protection.

How do we know this?  A fascinating study compared animals in cave art paintings with DNA fragments from bison remains of 15-50,000 years ago and found transitions in the DNA that coincided with animals represented in the cave art.  The animals represented during the coldest periods were the short horned, less humped at the shoulder, Wisent.**

Bison reserve, Bielowieza, Poland

The Bison reserve near Bielowieza has expansive enclosures for its animals, and lots of natural prairie grass for forage.

Captive breeding of Wisent at the Bison reserve just outside Bielowieza attempts to track genetic ancestry and propagate animals that could be released to the wild, but wild Wisent exist in small herds through the forest-grassland spaces in eastern Poland.  They are mighty hard to spot — judging from our early morning explorations of the area.

Bison reserve, Bielowieza, Poland

Bison reserve, Bielowieza, Poland

**http://www.nature.com/news/mysterious-origin-of-european-bison-revealed-using-dna-and-cave-art-1.20822

the Polish prairie

The Bielowieza forest is surrounded on the Polish side by farmland, much of which is hayed for dairy cattle.  Polish farmers seem to prefer haying their meadows of grasses and forbs, rather than planting monocultures of alfalfa.  As a result, forest visitors (the human variety) are treated to a colorful scene of perennial blooms, very similar to that we see in Minnesota prairies, only with a lot more color.

http://www.sciencemag.org/news/2017/06/ravens-remember-people-who-suckered-them-unfair-deal?utm_source=newsfromscience&utm_medium=facebook-text&utm_campaign=ravensremember-13457

We were amazed to find a number of the same species present in Polish prairies as we might find along roadsides in the U.S.  Of course we call these weeds, and perhaps they are in Poland, too. Or perhaps they really are part of the natural prairie mixture.

Oxeye daisy

Oxeye daisy looks the same in the Polish prairie

Prairie near Bialowieza forest

Wild carrot, hawkweed, brome, and timothy are similar constituents in Polish and U.S. Prairies

White stork, prairie near Bialowieza forest

Of course the birds are quite different. In a Minnesota prairie, if I spotted a long-legged bird in the prairie, it would probably be a Sandhill Crane. In Poland, the long legged birds are likely to be White Storks, the ones that bring all the Polish babies…

White Stork, Poland

Prairie wagon, near Bielowieza forest, Poland

And the mode of travel through prairies is different too. We don’t have any of these nifty wagons in the U.S., unfortunately.

Birds that buzz…

Two words that are usually said together:  bird song, or better yet songbirds, those usually small birds in your garden that produce the wonderful, lilting, sometimes piercing, often warbling, unique collection of notes that identifies each species.

But not all songbirds sing, or sing exclusively — some of them have adopted a buzz as part or all of their song. In fact, their soft buzzes or wheezes are remarkably similar and difficult to pinpoint when looking for that buzzing bird that you’re not really sure isn’t some sort of insect.  Why would male birds want to buzz instead of sing?

Take the Blue-winged Warbler for example; wouldn’t you assume from its name that its song would be a melodious warble, rather than a two-note “bee-buzz“?

blue-winged warbler-

A beautiful Blue-winged Warbler sitting out on the edge of the forest overlooking a prairie grassland, buzzing away.

blue-winged warbler-

A better look at the blue wing of the Blue-winged Warbler. He was little and mighty far away.

Just 20 feet away, a Clay-colored Sparrow is buzzing away, with a very similar, low frequency, raspy buzz call.

clay-colored sparrow-

Pale-colored, but with distinctive stripes on its head and face, the Clay-colored Sparrow blends in well to its usual background of dry grass.

clay-colored sparrow-

Its pink bill resembles that of a Field Sparrow, but its buzzing “song” makes it easy to identify.

Buzzing seems to be a common characteristic of “song” in grassland birds, like Grasshopper Sparrows and Savannah Sparrows.  So, one wonders if these birds are trying to avoid detection in prairie habitat by mimicking insects when they “sing”, or whether female birds just find buzzing particularly enticing?

It turns out that buzzing sound made with the bird equivalent of a larynx (called a syrinx), is actually quite physically challenging, and therefore could be an indicator to females of the quality of a potential mate.  German researchers* found that larger, more robust male Nightingales incorporated more buzzes in their song, and enjoyed greater attention from females than their less robust or younger competitors.

Another possible explanation for buzzing birds found in grassland habitats is that low frequency buzzing notes apparently carry long distances, and can be heard throughout and beyond the male’s territory.  Banded Wrens incorporated more buzzing notes in their early morning song that was directed toward other males in the nearby vicinity, at times before females were present.**

*Citation: Weiss M, Kiefer S, Kipper S (2012) Buzzwords in Females’ Ears? The Use of Buzz Songs in the Communication of Nightingales (Luscinia megarhynchos). PLoS ONE 7(9): e45057. https://doi.org/10.1371/journal.pone.0045057

**Citation: P.L. Trillo and S.L. Vehrenkamp. Anim Behav. Song types and their structural features are associated with specific contexts in the Banded Wren. 2005 Oct; 70(4): 921–935. https://dx.doi.org/10.1016/j.anbehav.2005.02.004

on the edge

Tromping around Weaver Dunes, south of Wabasha MN, for 8 hours trying to identify every bird we could find was exhausting but rewarding, and what an absolutely beautiful day to participate in The Nature Conservancy’s bird blitz on May 12.

Cape May Warbler-

First bird of the day — Cape May Warbler, high in a leafy tree (bane of photographers — the tree, not the bird)

The spring migration was running a little behind schedule, but we managed to find (and identify) 58 species (which admittedly doesn’t sound like a lot for 8 hours of work).  We explored a variety of habitats, but the best places to look were edges between shrub and forest, or prairie and forest.

Yellowrump Warbler-

Yellow-rumped Warblers outnumbered other warbler species, and thankfully posed at much lower elevations in the trees.

Rose-breasted Grosbeak-

We only saw one Rose-breasted Grosbeak, and he was quite shy about coming out in the open to show off his raspberry bib.

Lark Sparrow

Lark Sparrows were more common than the warblers, flashing their white outer tail feathers as they flew. True to their name, their song is much more of a warble than a buzz — i.e., lark-like.

Lark Sparrow

Lark Sparrows typically nest in shrubs and forage in grassy areas removed from the nest. They have the unusual habit of walking, instead of hopping.

Northern Waterthrush-

Down at the edge of a small pond, a Northern Waterthrush hunted for insects.

Northern Waterthrush-

A distinctive eyestripe and wagging tail made this large warbler easy to identify.

Brown Thrasher-

A Brown Thasher was very uncooperative about posing, and remained hidden in the dense foliage of trees in the grassy savannah.

Baltimore Oriole-

Orioles foraged high in leafy treetops, but were easy to find by listening for their characteristic song.

Gray-cheeked Thrush-

Another edge-lover found skulking among the low vegetation in the woods surrounding a pond was the Gray-cheeked Thrush, with its characteristic white eyering.

Our efforts were added to those of the birders walking other TNC properties throughout the tri-state region of MN, North Dakota, and South Dakota.  Together all observers on May 12 found over 200 different bird species, or approximately 50% of those known to reside or pass through MN on migration in May.  Not bad…it’s a nationwide competition, so we’ll see how MN bird numbers stack up with those elsewhere in the U.S.

Considering that our American birds have to navigate and survive stormy weather and drastic climate changes, glass windows and glass-covered buildings, marked habitat alterations, and depleted food supplies from all the pesticide and herbicide applications, it’s a wonder that we see the diversity that we do.

Fall-ish

Warm days, cool nights, sometimes rainy and blustery — that’s fall.  You never know what it’s going to be like because the weather changes day to day, or even from morning until evening.  But the combination of short daylength (less than 12 hrs of daylight) and very cool nights starts the color change in the vegetation that we love to see.  (For an explanation of how that color change happens — click here.)

fall-prairie-wm-obrien-park-

Not all plants are as sensitive to the daylength and temperature cues — making the fall season a long and colorful display.

fall-color-

Maples and aspens are some of the first to show their fall colors, and oaks are one of the last, making the forest a kaleidoscope of green, yellow, red, and orange.

new-england-aster-

A few remaining flowers like this New England Aster can still be found in the prairie, but there are few insects around.

milkweed-pod-

Milkweed pods open to disperse their airborne seeds.

yellow-rumped-warbler

Yellow-rumped Warblers are one of the more abundant migrant species, found and heard in almost every habitat — even the prairie.

nashville-warbler-

Waves of warblers (like this Nashville Warbler) move through with the weather fronts in the fall. But these are wary little birds, and even harder to photograph in the fall when they are feeding ravenously to replenish their migratory fat supply than they were back in the spring when they came through on their way north.

out on the prairie

We spent the weekend in central Minnesota taking photos of different stages of prairie restoration.  Prairie grasses are above knee high already, and there are quite a few perennial forbs flowering — injecting some highlights of color into that huge expanse of green.

prairie-flowers at Lake Johanna Esker

Tall stems of timothy grass stand behind the lower herbaceous perennials on the Lake Johanna Esker prairie.

Many thousands of years of growth of perennial prairie grasses in this area resulted in a several feet thick layer of black, organic-rich soil — perfect for farming.  But as a result, less than 2% of the original 19 million acres of native prairie remain.

prairie vs cropland in central Minnesota

Any prairie that could be plowed (not too dry or wet, not too steep or rocky) was converted to cropland over a hundred years ago. But here, pasture (on the right) is being returned to a prairie, while the hill in the background (too steep to plow) has been heavily grazed. In the absence of fire or heavy grazing pressure, prairies are easily invaded by trees.

Where there are large acreages of prairie or grassland landscape, we can usually find some of the native prairie animals and plants that live there.  What a treat to drive down one gravel road that dead-ended in a soybean field and find a family of Sandhill Cranes walking through the meadow grasses.

sandhill cranes-

This pair of Sandhill Cranes tried to distract us from finding their two chicks by walking up the hill away from where the chicks hid in the longer grass.

sandhill crane chick

One of the chicks was a little less than half the height of the adults — with no tail yet.

sandhill cranes-

I suppose they thought we might follow them up and over the hill, but as we backed away, they flew back toward the chicks.

Harvest time

It’s corn harvest time in parts of Minnesota.  Most the fields have either been cut down to stubble, or had the stubble plowed under, but a few fields were still being harvested when we drove through central Minnesota the other day.

corn harvest - central MN-

A harvester chewed its way down a row and prepared to turn around for another swipe churning up a lot of dust in the process. When it’s bin is full, it shoots the grain out the long arm into the bed of a waiting truck.

corn harvest in central MN

Corn stubble fields like this will attract numbers of migrating blackbirds, cranes, and waterfowl, but these harvesters are so efficient, they don’t leave much grain behind.

Rail cars full of corn dot the landscape, trucks hauling grain crowd the highways, and grain silos are bulging with feed left over from last winter’s storage plus the additional grain deposited this fall.  Sometimes there just isn’t anywhere to put all that corn, except on the ground waiting for the next available transport.

Mountain of corn at Sunburg, MN during fall harvest

A mountain of corn is building up on the ground next to two full storage silos in Sunburg, MN

corn harvest - central MN-

More trucks arrive in a steady stream, getting weighed first and then depositing their load in the growing mountain of corn.

mountain of corn-Sunburg, MN

At this point the mountain of excess corn is about 20 feet high and 150-200 feet long. How many tons would that be, I wonder? And what is the fate of this pile of corn left out to the elements for how many days?

old barn near Sundberg, MN

This old barn near Sunburg, MN has been falling down for several years, and this past year really took its toll on the structure.

Just the beginning

As nighttime temperatures dip toward freezing, the trees are starting to show a little color.  It’s just the beginning of the most colorful season of the year —

beginning fall color-

Warm days and cold nights signal plants to cease photosynthesis and begin breaking down the chorophyll pigment in their leaves to unmask other, colorful light-gathering pigments.

Fall weather and decreasing day length signal animals to begin making preparations for winter — either storing food (like the squirrels have been doing) or eating like crazy to get fat enough to migrate south.  Waves of warblers and other small songbirds have been moving through the Twin Cities recently, and some wind up in the backyard, looking for insects on late-blooming plants.

female or juvenile yellow-rumped warbler-

Large flocks of Yellow-rumped Warblers move quickly through the vegetation, but occasionally stop to pose for a photo.

showy goldenrod-

Only a few species of perennial plants are still flowering here, like this Showy Goldenrod that is buzzing with several species of insects.

showy goldenrod pollinators-

Pollinators looking for a late autumn meal of nectar and/or pollen crowd onto a Showy Goldenrod plant that stands out in a field of Little Bluestem grass.  In addition to the bumblebees, two species of hoverfly, a beetle, and a small wasp were foraging here.

sulfur butterfly on new england aster-

New England Aster was buzzing with Pink-edged Sulfur butterflies, bumblebees, and hoverflies.

Seed-eating migrants might find a banquet waiting for them too, as perennial plants put forth their seed crops.

canada goldenrod seed head

Canada Goldenrod seeds are buried in the wispy tendrils that help disperse the seed around the prairie.

indian grass-

Perennial grass seeds are ripe for the taking as well.

With all the rain late this summer, I hope this will be one of the most colorful fall seasons in recent years.  But that depends on the day-night temperature differences in the next few weeks.  So, stay tuned for more posts on fall color later.