Tag Archives: Western Chorus Frog

Cranberry Lake Park: Have Hope! Sure but Subtle Signs of Spring!

The solstice has passed; the days and nights get equal time. But when I’m shivering, my fingers and ears go numb in a stiff  wind, I struggle to hold on to the idea that we’re heading into spring. Until, that is, I head into the parks.

Blog by Cam Mannino

In mid-March,  water birds began splashing down in Cranberry Lake, finding any narrow stretch of open water within the ice sheet. They floated and fed – until one glorious morning, the whole lake turned liquid and bright blue! Migrating flocks honked, chattered and wheeled overhead. Some stopped to rest and feed before heading further north; others explored nesting sites. Our year ’round residents tuned up their spring songs. Territories must be established! Potential mates must be impressed! Best of all, the tiny frogs thawed after their frozen winter state – and now they are  singing! Can genuine spring, with its fulsome birdsong and burgeoning buds be far behind? I think not!

Water Birds Arrive Early, Despite the Ice – and the Muskrats Emerge, too!

It always impresses me that some of the first migrators to arrive in early spring are the water birds! They float, seemingly content, in the icy cracks that form as the sun begins to work on the frozen lake surface. Their cold water strategies involve body fat, oiled feathers, down insulation, and a circulation system which allows cool blood coming up from their feet to pass close to  warm blood traveling down, warming it as it returns to the heart. Below a group of Common Mergansers – black-headed males and brown-headed females –  glided along a thin channel of water on the far side of Cranberry Lake’s iced-over surface.

Common Mergansers – black-headed males, brown-headed females – find a small slit of open water at Cranberry Lake early in March.

Off in the distance, the Wednesday birders spotted the hunched silhouette of a Muskrat (Ondatra zibethicus) perched on the edge of the ice as a goose floated nearby. It slipped in and out of the water, hungry no doubt for food but also for a meager scrap of sunlight after living under the ice all winter!

Two sunny but cold days later, the ice had disappeared and the lake was bright blue and busy with migrating ducks and geese. Two Bufflehead (Bucephala albeola) and a group of Ring-necked Ducks (Aythya collaris)black-and-white males and brown females –   dove and surfaced as they foraged near a Canada Goose (Branta canadensis).

A group of Ring-necked Ducks and two Bufflehead dove and rose next to a Canada Goose as they rested and foraged in the lake.

I got a bit closer to a Bufflehead by checking from the opposite side of the lake. This lone male rocked along on the surface, bobbing under to feed every few minutes. Cornell Lab of Ornithology says Bufflehead accomplish this dive  by compressing their feathers to drive out the air and then pitching forward. A few seconds later, they pop to the surface like a cork and float on.

The Bufflehead dives underwater by pitching forward with its feathers compressed to squeeze out the air, making it less buoyant and able to submerge.

And that same cold morning, what I think was a large muskrat came steaming across the pond toward the eastern side. At the time, I thought this bustling swimmer was a Beaver (Castor canadensis), since there is a large beaver lodge on the western side of the lake. But I’m just not sure of that, so I’m sticking with it being a large muskrat. In the water, its tail looked wide enough to be a beaver, but as it approached the shore, it just didn’t seem to be big enough to be a beaver, unless it was a yearling. And beavers tend to swim with only their heads out of the water. In any case, nice to see this furry fellow plying the pond in the sunshine. What do you think? Big muskrat or young beaver?

The width of this swimmer’s tail made me think this was a beaver, but I think now it was a large muskrat.
From this nearing shore photo, it appears I’ve seen a large muskrat, rather than a small beaver.

Hearing the ancient bugle of the Sandhill Crane (Antigone canadensis), I quickly looked up to see two in the distance, flying into the far end of the lake.  Aren’t we lucky that they breed in our wetlands?

A pair of Sandhill Cranes fly in to check out the edge of Cranberry Lake as a possible breeding ground.

 Spring Songs Signal the Beginning of the Mating Season

As I approached the park one icy afternoon, bright spring music reached my ear – Western Chorus Frogs. These tiny frogs (Pseudacris triseriata – about 1.5 inches long!) are daytime relatives of the nocturnal Spring Peepers (Pseudacris crucifer). They spent the winter frozen solid, no heartbeat, no brain activity, but protected by an anti-freeze of sorts that keeps their tissues from breaking down. Pretty amazing! They thaw out and start singing as the days lengthen. The first afternoon I scanned a wetland trying to see these tiny creatures that seemed to be singing right at my feet, but I could not spot one! So on a second try a few days later, I found a log to sit on near the wetland in the trees just east of the parking lot. After about 20 minutes with my binoculars, I finally spotted two (of the hundreds that were probably there!), the sacks beneath their chins bulging, as they tried to impress a female with their piercing calls. Have a look and a listen!

Two tiny Chorus Frogs with bulging necks sing to attract a mate in the shallow water of a wetland.

A male Northern Cardinal (Cardinalis cardinalis) sang from the tree tops in the eastern meadow, turning every few minutes to send his territory call in a new direction. He’s a bit faint on the recording below, so you might need to turn your volume up! I got a bit closer to another male in a bush near the parking lot later on. He was doing “call and response” with another cardinal hidden in the trees nearby.

And of course, the American Robins (Turdus migratorius) that went south to Ohio and Kentucky returned as well, joining the hardy ones that spent the winter here.

One of many Robins that have returned from Ohio and Kentucky to breed here in the summer.

His spring call is also a bit soft.  And he makes a longish pause before his second “tit whoo” call.

Woodpeckers, of course, use drumming to establish territories, rather than singing.  Both male and female Downy Woodpeckers (Picoides pubescens) attract mates and protect territories with drumming. You can hear their typical drum roll in this Cornell Lab recording which was put to use by the little female Downy below.

I get a huge kick out of hearing flocks of American Goldfinches (Spinus tristis) chirp in the shrubs and small trees. To my ear, they are the only bird that actually says “tweet, tweet, tweet!”  Have a listen at this link and see if you agree! The males are currently molting into their bright yellow summer outfits.

Groups of American Goldfinches are singing their “tweet, tweet” calls in Cranberry Lake Park right now.

On a bird walk one Wednesday, we heard the far distant, insistent drumming of a Pileated Woodpecker (Dryocopus pileatus). Mark, one of the great spotters in the bird group, finally located it with binoculars on a very distant tree, and suddenly its mate (we assumed) dove across the trail far ahead of us before slipping up and away between the trees. No chance for a photo.  But here’s an incredible closeup by talented photographer Monica Krancevic at iNaturalist.org.

Pileated Woodpecker by Monica Krancevic (CC BY-NC) at iNaturalist.org

The First Blooms and Some Sturdy Ferns Wait Patiently

The lovely red blossoms of the Silver Maple (Acer saccharinum) brighten gray days in early spring. They emerge on bare branches before the leaves and are pollinated by the wind before butterflies or other insects emerge and start to pollinate. Those big clusters of scarlet florets are a great food source for hungry squirrels in the spring, when food is scarce, since nuts and seeds are either already eaten or beginning to crack open and sprout.  Last week, I found these male (staminate) clusters fallen from the treetops onto the exposed roots of a large silver maple. I love how the red at the edge of the root echoes the red of the flowers.

The scarlet blossoms of a silver maple are echoed in the root of the tree itself.

Take a closer look at this cluster of florets, some still closed, others waving stamens that have already shed their pollen to wind.  Once pollinated, the female florets will produce winged fruits, called samaras.

A closeup of a cluster of male florets, some closed, some with their stamens already emptied of pollen.

Nearby on the trail to the lake, some sturdy ferns survived the winter with fertile fronds intact.  The brown beads below are the sporangia on the fertile fronds of the Sensitive Fern (Onoclea sensibilis) that carry the spores for this year’s crop of new plants. On the right, are the vegetative fronds that provide sugars through photosynthesis in the summer months.

And the feathery ones below left are the fertile fronds of Ostrich Fern (Matteuccia struthiopteris) whose spores will be released and carried by the wind in the spring. Their vegetative fronds on the right stood tall and bright green, taking advantage of the moist soil and spotty sunshine in the forest.

Spring Just Peeks Out…Here and There

A pair of Canada Geese rest in the quiet refuge of a shaded wetland

Behind a scrim of small trees on the way to the lake, I spotted these two Canada Geese floating serenely in a secluded wetland, away from the noisy flocks gathering on the lake. They reminded me that, at this time of year, spring has to be sought out. It appears and disappears. One day the lake is iced over, a few days later it’s rippling and blue and then the snow falls again. On some days, spring isn’t easily seen – just a few red blossom clusters floating in a vernal pool  or scattered on the lifeless grass. Sometimes spring can only be heard and not seen. Frogs as tiny as your thumb sing unseen one day and the next, perch on a bit of floating grass, their throats bulging with amorous sound. Flocks twitter or honk high in a cold blue sky or male birds rehearse the first tentative versions of their mating songs. Woodpeckers tap out a seductive rhythm on the bark of trees.

The Eastern Meadow at Cranberry Lake doesn’t look very spring-like yet – but the clues are there.

Early spring isn’t flamboyant and colorful, like it will be in a few weeks. It’s hesitant, waiting to be found and enjoyed if we can only slow down enough. If we watch, we’ll see it peeking through the alternating rain or snowfall, cracking and opening in thawing ponds or hear it whistling, chirping, trilling from inside the brush or high in the treetops. So I hope you have time to delight in these  subtle hints of early spring as they unfold. It won’t be long now…

Footnote: My sources for information, besides Oakland Township's Stewardship Manager Ben VanderWeide, are as follows: Caterpillars of Eastern North America by David L. Wagner; inaturalist.org;Allaboutbirds.org, the website of the Cornell Ornithology Lab at Cornell University; Wikipedia; Herbarium of the University of Michigan at michiganflora.net; various Michigan Field Guides by Stan Tekiela;Butterflies of Michigan Field Guide by Jaret C. Daniels,  and others as cited in the text.

THIS WEEK AT BEAR CREEK: Off-and-On Spring, a Prescribed Burn, and Two Special Bird Sightings

 

Flooding a week later
The Playground Pond flooding to the west after heavy spring rains

This Week at Bear Creek celebrated its first birthday this week. We’ve come full circle on the calendar exploring together what’s blooming, singing, buzzing and trotting through the park. I’ve had such a great time watching, asking questions of Dr. Ben VanderWeide, our township Stewardship Manager, reading your comments and pouring over books and blogs to research these pieces. I hope it has brought you some surprises and fresh insights, too. I’ve proposed to Ben that we widen the lens a bit this year and rather than focusing on one park, I’ll explore other parks in the township in a series we’re calling “Out and About in Oakland Township.” So watch for that coming soon!

Blog post and photos by Cam Mannino
Blog post and photos by Cam Mannino

But for now, let’s explore what’s been happening in Bear Creek for the last couple of weeks while I was reporting on Bear Creek history. Spring  arrived, retreated and struggled to make a comeback, no doubt confusing  the first migrating birds (one new to me!), singing frogs and emerging insects. A successful prescribed burn lit the Old Fields, returning nutrients to the earth and warming the soil with black ash.  It also provided some pretty nice hunting for birds of prey, including a second bird  I’d never seen before.

A Tentative Start to Spring: The Birds

Before we watch the migrators, here’s our old friend, the Black- capped Chickadee (Poecile atricapillus) doing something fun. I learned a while ago that this little native can excavate holes in dead trees and/or trees with softer bark. And one cold morning, near the marsh closest to Snell Road, I spotted one doing just that. Notice the wood shavings on its head in the left photo and on its beak in the right photo. It was dropping the shavings on the ground as it worked diligently. (Click on photos to enlarge; hover cursor for captions.)

Back to spring arrivals. The Song Sparrows (Melospiza melodia) returned, some practicing parts of their spring song, but mostly just searching in the wetlands and brush for something to eat!

One warm morning, an American Woodcock (Scolopax minor) shot out from under my feet and two days later I saw one probing with its long beak among thick vines and brambles at the edge of  the wetland below the benches on the south hill.  I’d never seen one in Bear Creek before! This oddly shaped bird, with its squared-off head and widely spaced eyes, stayed just out of sight in the underbrush. I’ll spare you my attempt at a photo. Here’s a much better one of the Woodcock from Cornell Lab! I hope to see this interesting bird doing  its “cool aerial mating dance,” as Ben calls it, at a stewardship birding event he’s planned for Cranberry Lake on Earth Day, April 22 at 7:30 pm (Mark your calendars!).

A flock of  migrators, the Grackles (Quiscalus quiscula), with their light eyes and iridescent coats, seem to have taken over the marsh just north of the playground. Their calls, akin to the sound of a rusty gate, scrape the air as these large birds begin establishing territories.

Grackle in sunlight
The Grackles call, or “song,” sounds like the squeak of a rusty gate.

They share some wetlands with another summer visitor, the Red-winged Blackbird (Agelaius phoeniceus), who trills a sharp call while showing off his epaulets. Since the females hadn’t arrived last week, this guy seemed more focused on food one cold morning.

Red-winged blackbird in Autumn Olive
Male Red-winged Blackbirds are trilling in and around the wetlands to establish territories before the females arrive.

The Northern Cardinals (Cardinalis cardinalis)are performing their spring duets, since both the male and female trill a large variety of songs. Here’s a male near the marsh and then a recording of his lovely song which he began a few minutes later. (Be sure to increase your volume.)

Cardinal male
A male Cardinal near the marsh

And of course, I couldn’t resist a pair of Eastern Bluebirds (Sialia sialis).

The Frog Serenade Begins

The spring frogs have thawed out after being frozen all winter.  They are singing with abandon in every wet spot in the park, trying to attract their mates. During the day, we’re likely to hear either the Wood Frog (Lithobates sylvaticus) or the Western Chorus Frog (Pseudacris triseriata) or both. In this short sound recording, the high pitched continuous singing is the song of the Western Chorus Frog and the lower, almost conversational croaking is the song of the  Wood Frogs. 

Wood Frogs like to float in the water and sing, so look for concentric circles on the surface and you’ll often see the 2 – 2.5 inch male croaking. This one floated in the marsh west of the Snell entrance.

Wood frog in pond near house
A Wood Frog floating and singing in a marsh near the Snell entrance

The Western Chorus Frog is smaller, only 1 – 1.5 inches, but it has a mighty bubble at its throat as it sings.  I caught this one in mid-croak a year ago.

Chorus frog full cheep
Chorus frog full cheep

The water is deep at the Center Pond, so Painted Turtles (Chrysemys picta)have emerged from winter torpor under the mud to share whatever bits of logs are available in order to bask in the thin sunlight. I’m waiting to see how many hatchlings survived the winter in their shared nests!

Turtle threesome
Three on a log at the Center Pond

Plants Sprouting, A Risk-taking Caterpillar and a Very Tiny Spider!

Frost in late March
Frost in late March

The last week of March thick frost covered all of last year’s plants at Bear Creek, including a Goldenrod Ball Gall missing its larval inhabitant and one of last year’s Queen Anne’s Lace (Daucus carota) dried blossoms.

But the sun came out and this year’s plants began to emerge. Each spring I look for the first fascinating but homely Skunk Cabbage (Symplocarpus foetidusaround the marsh at the western entrance to the Oak-Hickory forest.  And there it was, nosing its way out of the mud.

Skunk Cabbage2
Skunk Cabbage is one of the first plants of spring.

Nearby, on the path behind the Center Pond, a minuscule spider worked diligently on its web strung between two branches of native Pussy Willow (Salix discolor). And some sort of caterpillar appeared as well, which might be that of the striking Virginia Ctenucha Moth. The caterpillars of this moth feed on grasses and sedges and are often found in open fields in early spring and fall.

Over near Snell Road, I spotted some lovely catkins and Ben tells me I’ve found Hazelnut (Corylus americana), a plant that George Comps harvested for nuts when he lived on this piece of land in the 1940’s. The long yellow ones are male flowers and if you look closely, you’ll see small red ones that are female – both on the same plant.

American Hazel catkins
American Hazel with long golden male catkins and inconspicuous red female flowers.

Up in the new native bed near the pavilion, transplanted last fall from a generous donor, the lovely little Sharp-lobed Hepatica (Hepatica acutiloba) bloomed quietly one warm morning.

Hepatica closeup
Hepatica in the newest native bed next to the pavilion

Prescribed Burn:  A Boost for Native Plants

Last week Dr. Ben, township staff and 6 volunteers conducted a prescribed burn down the center of the southern part of Bear Creek, to the left and right of the Walnut Lane. Many native plants in our area are adapted to fire from natural sources and thousands of years of clearing and fertilizing with fire by local Native American communities.  In fact, many native plants form buds underground that allow them to sprout vigorously after fire. Non-native plants and invasives may or may not be fire-adapted, so periodic burning can be a setback for them.

Heidi dripping fire
Volunteer, Heidi Patterson, drips a low flame to start the blaze while other fire crew members stand by with water.

Fire also returns to the earth the nutrients in dead material from the previous year and provides a black ash surface that absorbs heat from the sun (solar radiation), giving plants a longer growing season.

Dr. Ben serves as “fire boss” for our crew and trained these volunteers during the winter. It was wonderful to see them do such a careful, well-coordinated burn, while saving the township the cost of hiring a burn crew. Thank you to volunteers Steve Powell, David Lazar, Antonio Xeira, Dioniza Toth-Reinalt, Heidi Paterson, and Jim Lloyd, plus Township staff member Jeff Johnson, and of course Dr. Ben for a stewardship job well done!

About that Hawk and its Fellow Hunter…

Avian hunters were super appreciative of the burn! A large Red-tailed Hawk (Buteo jamaicensis) perched calmly on a limb as the smoke floated up from the  fires below. As Ben pointed out, she knew it would make finding her prey so much easier!

Red Tailed Hawk Hunting after Fire
Red-tailed Hawk watches the field “like a hawk” looking for prey during the prescribed burn.

A  female American Kestrel (Falco sparvarius) found a mole after the fire and took it up into a tree on the eastern edge of the Old Field.  Kestrels are the smallest North American falcons and are declining in some of their range due partly to predation by hawks and even crows – so it’s great to see one at Bear Creek.  Kestrels are known to cache some of their food, but after the winter months, this one seemed very determined to have a meal!  (Thanks to Ben for ID of this bird and the caterpillar above!)

Sharp-shinned Hawk w a mole
An American Kestrel found a mole for dinner after the prescribed burn.

From One Spring to the Next

Tree in puddle
Black Walnut Tree reflected in a puddle after heavy rainstorms

So thank you for circling the year with me at Bear Creek. It’s difficult to choose favorite moments because every season has its joys.  I know I’ll remember the bulge of the Chorus Frog’s throat in early spring, the head of a Cedar Waxwing protruding from her nest in early summer, two baby wrens taking a dust bath on the Walnut Lane, the Western Slope covered with Monarch butterflies hanging from purple New England Asters in autumn, and learning how muskrats cruise under winter ice and frogs freeze solid before resurrecting in the spring. If you have favorite moments, photos, new realizations, I’d love to hear about them in the comments below.

But let’s be off to another year!  We’ll keep periodically visiting Bear Creek, of course, but also venture out to Lost Lake Nature Park, Cranberry Lake Park, Draper Twin Lake Park, Charles Ilsley Park, Stony Creek Ravine Nature Park, Blue Heron Environmental Area, Gallagher Creek Park, Marsh View Park, and the Paint Creek Trail to see all the diversity our green gem of a township has to offer!  Now I’m off to see if I can find some warblers…

Footnote:  My sources for information are as follows: Ritland, D. B., & Brower, L. P. (1991); Stokes Nature Guides: A Guide to Bird Behavior Volumes 1-3, Allaboutbirds.org, the website of the Cornell Ornithology Lab at Cornell University; Wikipedia; http://www.butterfliesandmoths.org; Herbarium of the University of Michigan at michiganflora.net; various Michigan Field Guides by Stan Tekiela; Butterflies of Michigan Field Guide by Jaret C. Daniels; University of Wisconsin's Bug Lady at www4.uwm.edu/fieldstation/naturalhistory/bugoftheweek/ for insect info; http://www.migrationresearch.org/mbo/id/rbgr.html for migration info; invaluable wildflower identification from local expert, Maryann Whitman; experienced birder Ruth Glass, bird walk leader at Stoney Creek Metro Park for bird identification; Birds of North America Online; Audubon.org; Nature in Winter by Donald Stokes, Trees in My Forest by Bernd Heinrich, Winter World by Bernd Heinrich, Savannah River Ecology Lab (Univ of Georgia); Tortoise Trust website www.tortoisetrust.org;  An Orchard Invisible: A Natural History of Seeds by Jonathan Silvertown; The Ecology of Plants by Gurevitch, Scheiner and Fox; other sites as cited in the text.