Category Archives: Deer

In The Rut: Deer Pairing Up in Frick Park

8-point buck with doe in Frick Park, 30 Oct 2024 (photo by Charity Kheshgi)

5 November 2024

Last Sunday in Frick Park we were privileged to see an 8-point buck hanging out with a doe. They were obviously a couple and merely gazed at us before returning to their interest in each other. The only thing that really got their attention was an off-lease dog on a trail to the right. Fortunately for the dog, he and his owner went the other way.

The paired stayed close together and the buck licked the doe’s face, ears and estrous. Bright light and shadows make it difficult to see them in this photo so I have brightened the remaining pictures.

8-point buck licks doe’s ears in Frick Park, 30 Oct 2024 (photo by Charity Kheshgi)

Over-bright photos allow you to pick out the deer.

8-point buck licks doe’s face in Frick Park, 30 Oct 2024 (photo by Charity Kheshgi)
8-point buck sniffing doe’s neck in Frick Park, 30 Oct 2024 (photo by Charity Kheshgi)

What we witnessed was the “tending bond” when a buck shadows a doe for 24 to 48 hours, mating with her multiple times and making sure another buck doesn’t interrupt. (We did not stay for their finale.)

Most people never see this because white-tailed deer hide in dense forest during this period but Frick Park has a serious browse line so there is nowhere to hide.

During the 20th century a myth about deer mating practices governed deer management in Pennsylvania. Namely that it was OK to have 1 white-tailed buck for every 7 does because one buck could “service” all of them in the few weeks that all the does were in heat. Surely the males could get it done.

But they couldn’t. By the end of the 20th century PA hunters were routinely harvesting 90% of the bucks before they were two years old because the sex ratio was so skewed that there was not enough time for pairing up.

In 2002 the PA Game Commission changed deer management practices with antler restrictions to protect the young males and increased doe harvest to balance the sex ratio. The combination has given Pennsylvania’s deer the time they need to form a temporary pair bond.

p.s. Watch out for deer crossing the road! Chances are way too high that are you’ll hit a deer in PA during the rut in October/November.

More Weeds That Deer Don’t Eat

Sweet wormwood (Artemisia annua) in Schenley Park, 30 August 2024 (photo by Kate St. John)

4 September 2024

Last weekend I noticed this group of tall plants in Schenley Park with a distinctly Christmas tree shape. They are certainly weeds and are thriving in an area where deer have eaten all the non-poisonous native plants. But they haven’t eaten these.

I took a closeup of the leaves and asked Picture This to identify it: Sweet wormwood (Artemisia annua), native to temperate Asia.

Sweet wormwood (Artemisia annua) in Schenley Park, 25 Aug 2024 (photo by Kate St. John)

The Artemisia genus includes mugwort, wormwood, and sagebrush, all of which taste bitter and smell strong when their foliage or stems are crushed. Deer find this extremely unpalatable and can smell from far away that it’s too ugly to approach.

Deer in Frick Park, 17 Aug 2024 (photo by Kate St. John)

Some Artemisia plants also have medicinal properties. Sweet wormwood (A. annua) contains artemisinin which was discovered in 1972 and is used to treat malaria. Unfortunately the malarial parasite in Southeast Asia has developed artemisinin resistance so the drug can no longer be used alone to cure the disease.

Sweet wormwood’s close relative common mugwort (Artemisia vulgaris) also has a wide range of supposed pharmacological uses. These uses probably account for the plant’s presence in North America. The Pittsburgh area has plenty of it — another plant that deer don’t eat.

Mugwort (Artemisia vulgaris) at the Hays Eagle Watch site, June 2017 (photo by Kate St. John)

Sweet wormwood may be thriving this year because its mature plants are fairly drought resistant — and we are in a drought.

U.S. Drought Monitor map from UNL, 2024-08-27

Drought and deer have combined this summer to flood Pittsburgh with so many weeds.

Grass Carpet in the Woods

Stiltgrass carpeting the ground in Schenley Park, 16 August 2024 (photo by Kate St. John)

25 August 2024

At this time of year the woods in southwestern Pennsylvania often look as if gardeners have removed all the underbrush and left a thick carpet of grass on the forest floor. The “gardeners” are overabundant white-tailed deer who selectively eat their favorite foods and leave behind invasive Japanese stiltgrass (Microstegium vimineum).

Japanese stiltgrass came to the U.S. in packing crates in the early 1900s as padding to protect porcelain shipped from China. Of course we threw it out when we unpacked the crates. It took root and was discovered in Tennesse in 1919. More than 100 years later it blankets much of the eastern U.S.

Range map of invasive Japanese stiltgrass in North America (EDDMapS. 2024. Early Detection & Distribution Mapping System. The University of Georgia – Center for Invasive Species and Ecosystem Health. Available online at http://www.eddmaps.org/; last accessed August 25, 2024.)

Japanese stiltgrass is easy to identify because it has a shiny midrib (topside) and the midrib is not in the middle of the leaf (underside).

Shiny midrib on topside of Japanese stiltgrass leaf (photo by Kate St. John)
Back of the leaf: Japanese stiltgrass (photo by Kate St.John)
Japanese stiltgrass mid rib is not in the middle. Back of the leaf: (photo by Kate St.John)

Amazing as it seems, Japanese stiltgrass is an annual that dies every winter and grows back from seed the next spring. Its thick green carpet in summer shades out native species.

Japanese stiltgrass carpet, Butler-Freeport Trail, July 2017 (photo by Kate St. John)

After it goes to seed in early fall it dies and becomes a brown drape over the landscape in winter. This gives it the alternate common name of “Nepalese browntop.”

Japanese stiltgrass in winter in PA, Dec 2017 (photo by Dave Bonta via Flickr Creative Commons license)

Japanese stiltgrass comes back thickly every year because it drops so much seed in the soil. It’s possible to get rid of it … eventually .. through hand pulling or goats. Pittsburgh Parks Conservancy is using both techniques in Hays Woods this year.

If you have Japanese stiltgrass in your yard, Penn State Extension has these practical remedies for removing it.

Watch this video for more identification clues.

Seen This Week: Warblers and Late Summer Flowers

Black-throated green warbler, Frick Park, 14 Aug 2024 (photo by Charity Kheshgi)

17 August 2024

This was a week of still-nesting swallows, pretty flowers, migrating warblers, and many, many deer in the city parks.

Moraine State Park, 11 August. Charity Kheshgi and I were surprised to see cliff swallows still nesting on 11 August at the Rt 528 Boat Launch area. Parents were feeding young at four to five nests.

Cliff swallows with young in nest, Moraine State Park, 11 Aug 2024 (photo by Charity Kheshgi)

Late summer flowers: Best photos this week are butter-and-eggs (non-native), spreading dogbane and blue vervain.

Butter and eggs, in the snapdragon family, Southside Riverfront Park, 12 August (photo by Kate St. John)
Spreading dogbane, Moraine State Park, 11 August 2024 (photo by Kate St. John)
Blue vervain, Southside Riverfront Park, 12 August (photo by Kate St. John)

Warblers at Frick Park: On 14 August Charity Kheshgi and I saw a good flock of warblers on Trough Trail. Blackburnians were still considered rare on the 14th (too early for them) but we found five! Here’s one eyeing a bug on Japanese angelica, a devil’s walking stick look-alike.

Blackburnian warbler, Frick Park, 14 Aug 2024 (photo by Charity Kheshgi)

We recognized distinctive plumage on each of the 5 Blackburnians. As if to prove there were so many, three posed in one shot.

3 Blackburnian warblers in one shot, Frick Park, 14 Aug 2024 (photo by Charity Kheshgi)

We also saw one immature chestnut-sided warbler hanging out in the flock.

Immature chestnut-sided warbler, Frick Park, 14 Aug 2024 (photo by Charity Kheshgi)

Deer: Schenley and Frick Parks, 14 and 16 August

It was a big week for deer in the city parks. I saw 10 in Frick on Wednesday, and 9 in Schenley on Friday. Of the 9, more than half were young or spotted fawns that were born this year. If my tally is representative, the Schenley deer population has doubled itself in just one year.

3 deer in Frick Park, 14 Aug 12024 (photo by Kate St. John)

I believe that the doe in this photo is shedding her summer fur (rusty color) to switch to her winter coat (gray-brown).

Spotted fawn with doe in Schenley, 16 Aug 12024 (photo by Kate St. John)
2 of the 9 deer seen in Schenley on 16 August 2024 (photo by Kate St. John)

Why are deer so easy to see in Schenley Park? Because there is no underbrush to hide them. There are so many deer that they ate all the underbrush. So there’s nowhere to hide.

p.s. The green grass in the photo is Japanese stiltgrass, a plant that deer don’t eat.

Seen This Week: August Flowers

Cosmos in bloom, Shadyside, 5 Aug 2024 (photo by Kate St. John)

10 August 2024

This week a flower garden caught my attention with bright yellow-orange cosmos flowers. The plants were in three stages: flowering, going to seed, and seeds formed.

Cosmos suphureus petals are quite showy to attract pollinators to the central disk. When the small flowers inside the disk are fertilized the petals fall off and the disk begins to develop into long thin seedpods.

Cosmos: A single flower going to seed, 5 Aug 2024 (photo by Kate St. John)

When complete the seed pods resemble the hitchhiking seeds of beggar ticks (Bidens frondosa). Both are in the Coreopsideae tribe along with coreoposis, dahlias and many others.

Cosmos: Seeds maturing, 5 Aug 2024 (photo by Kate St. John)

Also seen …

It’s August and, as expected, deer are more visible in Schenley Park. Two does and two fawns approached Panther Hollow Lake on Friday. We can expect to see lots of deer lounging in the city parks in the days ahead. It is The Calm Before The Rut.

Four deer in Schenley Park, 9 Aug 2024 (photo by Kate St. John)

On the cloudy morning of 6 August, daisy fleabane (Erigeron annuus) was still opening its flowers in Frick Park. Fleabane petals respond to light levels. It’s part of Fleabane’s daily exercise program.

Daisy fleabane, still opening flowers, Frick Park, 6 Aug 2024 (photo by Kate St. John)

After all these years I’ve just discovered that horseweed (Erigeron canadensis) is a fleabane. (That’s what comes of learning plants on the fly.)

Horseweed in bloom, near Aspinwall Riverfront Park, 8 Aug 2024 (photo by Kate St. John)

Seen Yesterday: Flowers and Oh, Deer

New York ironweed, Schenley Park, 19 July 2024 (photo by Kate St. John)

20 July 2024

Yesterday was my first opportunity to visit Schenley Park in more than a week.

  • Deep purple flowers on New York ironweed (Veronia noveboracensis)
  • Feverfew (Tanacetum parthenium) in bloom, a non-native plant from Eurasia.
  • Eastern bottlebrush grass (Elymus hystrix) with tiny spider threads.
  • Pavement glowing in the sun? No, pond scum on Panther Hollow Lake.
  • Dead adult spotted lanternfly nose-down with legs flexed open. Shadyside, 18 July.
  • Oh deer … Details near their photos.
Feverfew, Schenley Park, 19 July 2024 (photo by Kate St. John)
Eastern bottlebrush grass with tiny spider webs, Schenley Park, 19 July 2024 (photo by Kate St. John)
The surface of Panther Hollow Lake, Schenley Park 19 July 2024 (photo by Kate St. John)

I took a brief walk in my neighborhood on Thursday 18 July and found a dead adult spotted lanternfly, my first this year but I was out of town. It is nose-down to the pavement because its legs are flexed open.

Dead adult spotted lanternfly, Shadyside in Pittsburgh, 18 July 2024 (photo by Kate St. John)

Oh deer. Yesterday I saw four deer in Schenley Park; three in this family. The two spotted fawns appear to be a month younger than this year’s cohort that were born in May. If so, it was because their mother bred later than the rest of the herd, perhaps because she was a fawn herself last year.

One-year-old mother (probably) with two spotted fawns, Schenley Park, 19 July 2024 (photo by Kate St. John)

In the photo above, notice how little food there is on the ground. Without much to eat, deer in Schenley Park browse on foods they don’t like, such as the Japanese knotweed below.

Japanese knotweed browsed by deer, Schenley Park, 28 June 2024 (photo by Kate St. John)

Neighborhood gardens have a lot more food, so guess where the deer go. Last month I saw two in a garden with plants up to their shoulders. Not for long, though. As I watched one of them opened its mouth to take a large bite.

Deer eating in a garden on Ellsworth Ave, Pittsburgh, 17 June 2024 (photo by Kate St. John)

Puzzling Objects Seen This Week

Leaf-out reveals the browseline, Schenley Park, 5 May 2024 (photo by Kate St. John)

11 May 2024

This week I photographed a few puzzling objects for the record.

When I took a photo of Full Leaf trees in Schenley Park on 5 May I noticed something newly visible in the presence of leaves. Can you see it?

Look at the center of the photo where the path disappears in the distance. Above the path is a gap that allows you to see further under the trees. The gap flows to the right and follows the contour of the hillside. That’s the browseline, the cumulative effect of too many deer eating at the same location over and over.

I saw a native(!) honeysuckle this week. Pink with fused leaves, it’s called limber or glaucous honeysuckle (Lonicera dioica).

Limber or glaucous honeysuckle, Moraine State Park, 7 May 2024 (photo by Kate St. John)

Was this a cattle egret at Moraine State Park? If so it was a rare bird! Nope. It’s a white bag.

Cattle Egret at Moraine State Park? (photo by Kate St. John, 7 May 2024)

On 3 May a leaf-footed bug appeared to walk across the sky.

Leaf-footed bug walks across the sky, 3 May 2024 (photo by Kate St. John)

During the Pittsburgh Marathon Dippy the dinosaur watched near the halfway mark.

Dippy wears black and gold for the Pittsburgh Marathon, 5 May 2024 (photo by Kate St. John)

What puzzles will we see this week?

Seen This Week: Graupel, Flood and Flowers

Bloodroot blooming at Independence Marsh, 31 March 2024 (photo by Kate St. John)

6 April 2024

This week March went out like a lamb and April came in like a lion.

After photographing garden flowers on Easter morning I traveled out to Independence Marsh in Beaver County. I did not find my target bird, rusty blackbirds, but I did find spring flowers: Dutchmans breeches, cutleaf toothwort, bloodroot (above) and the first tiny bloom on shooting star (below).

Early bloom on shooting star, Independence Marsh, 31 March 2024 (photo by Kate St. John)

As soon as March was over, things went wrong. I should have known when I saw this troubled sky of mammatus clouds on Saturday, 30 March. Not a good sign.

Mammatus clouds presage a week of rain, snow and graupel in Pittsburgh, 30 March 2024 (photo by Kate St. John)

It rained and rained and rained on April 1-3, setting a record of 2.68 inches on April 2. Streams and basements were hit hard while the rain was falling. The rivers rose, as shown at at Duck Hollow on 4 April with the Monongahela River at parking lot level. (more flood photos and videos here)

Duck Hollow parking lot — A River Runs Through It — 4 April 2024, 7:19am ET

Later that same day, Thursday 4 April, the temperature fell and so did graupel.

Graupel falls o n4 April 2024 (video by Kate St. John)

Today it’s cold but the precipitation has finally stopped.

Meanwhile ….Remember those beautiful tulips I posted last Sunday, Easter morning?

BEFORE –> Tulips on N. Neville St on Easter morning, 31 March 2024 (photo by Kate St. John)

And remember the deer I saw between two highrises in Oakland on 24 March?

A deer browsing the garden at a highrise in Pittsburgh, 5:30am 24 March 2024 (photo by Kate St. John)

Well, the two met up and the tulips did not fare well.

AFTER –> Same tulips eaten by deer on N. Neville St as of 2 April 2024 (photo by Kate St. John)

That was on N Neville Street. Here’s N Craig Street.

BEFORE –> Tulips in front of a highrise on N Craig St, Easter morning, 31 March 2024 (photo by Kate St. John)
AFTER –> Tulips eaten by deer on N Craig St, 4 April 2024 (photo by Kate St. John)

Deer damage has come to the “asphalt jungle.”

(photos by Kate St. John)

Seen This Week: Ducks, a Swan and Leaf Out

Blue-winged teal, Moraine State Park, 27 March 2024 (photo by Charity Kheshgi)

30 March 2024

A Wednesday trip to Moraine State Park was cold and gray but quite worthwhile. We saw 300(!) red-breasted mergansers, many ring-necked ducks, blue-winged teal and a rare bird — a trumpeter swan. Charity Kheshgi’s photos show off the teal and swan.

Trumpeter swan, Moraine State Park, 27 March 2024 (photo by Charity Kheshgi)

Trumpeter swans (Cygnus buccinator) are “the heaviest living bird native to North America and the largest extant species of waterfowl.” They were nearly extinct in 1933 — only 70 remained in the wild — but several thousand were then found in Alaska. “Careful re-introductions by wildlife agencies and the Trumpeter Swan Society gradually restored the North American wild population to over 46,000 birds by 2010.” The trumpeter at Moraine is one of their descendants. (quotes from Wikipedia)

Spring is 20 days early in Pittsburgh this year. To prove it the yellow buckeye trees were in near-full-leaf on Thursday 28 March in Schenley Park.

Yellow buckeye leaves open and green, Schenley Park, 28 March 2024 (photo by Kate St. John)

They are 8 days later than the astoundingly early spring of March 2012. Click here to read about that year.

Comparing two springs, yellow buckeyes’ early leaf-out, Schenley, March 2012 and 2024 (photos by Kate St. John)

Early spring is the hungriest time of year for deer in Pennsylvania because they’ve already eaten all the easy-to-reach food. When the deer population is greater than the area’s carrying capacity they seek out food in unusual places. Thus I was amazed but not surprised to see a deer browsing the bushes next to our highrise at 5:30am. There is nothing to eat down there. There is nothing to eat anywhere near here.

A deer browses at a highrise in Pittsburgh, 5:30am 24 March 2024 (photo by Kate St. John)

Seen This Week: River Reflections and High Water

Sunrise in Pittsburgh, 7 Feb 2024 (photo by Kate St. John)

10 February 2024

Beautiful sunrises, calm reflections and high water at Duck Hollow were on tap this week in Pittsburgh.

Wind-less clear skies along the Monongahela River at Duck Hollow, 4 Feb 2024 (photo by Kate St. John)
Pastel sunrise on 8 Feb 2024 (photo by Kate St. John)

The week began as Winter but ended even warmer than early Spring. The tulips in my neighborhood are well above ground, fortunately without flower buds. One week from today, on 17 Feb, the weather forecast calls for temperatures as low as 19°F.

These tulips think it’s already spring, Pittsburgh, 7 Feb 2024 (photo by Kate St. John)

The tulips survive in my too-many-deer neighborhood because they’re surrounded by buildings and tall fences with no obvious exit other than a narrow driveway.

I thought that the maze of buildings and driveways would protect these Japanese yews in front of Newell-Simon Hall at Carnegie Mellon, but deer found their way in and munched the bushes down to sticks. There’s a lot more to eat here. The deer will be back.

Deer damaged yews at Newell-Simon Hall, CMU, 7 Feb 2024 (photo by Kate St. John)