Category Archives: Mammals

Raccoon Redux

Bald eagle pair scares off raccoon approaching their nest, 17 Feb 2021 (screenshot from PixCams on YouTube)

19 February 2021

On Wednesday night, 17 February just after 7pm, a raccoon scaled one of the branches that holds the Hays bald eagle nest. The mother eagle was on the nest and heard the raccoon coming so she rose up, spread her wings, and scared him away.

Seven years ago a raccoon intruder did the same thing. This one was a little braver.

The raccoon hid nearby, frozen in place, but four minutes later he moved again and the father eagle arrived to help. Two eagles!! The raccoon finally left.

This week’s episode was a raccoon redux of …

See Mary Ann Thomas’ Trib Live report, Pittsburgh Hays Bald Eagles Attack Raccoon Intruder, with video of Wednesday’s raccoon leaving.

Watch the Hays Nest Eaglecam to see what happens next.

(screenshot from PixCams on YouTube)

UPDATE, 19 Feb 2021: The female bald eagle at Hays laid her 3rd egg on 19 February 2021.

UPDATE, 22 Feb 2021: On the night of 22 Feb 2021 a great horned owl knocked the male Hays bald eagle off his roosting perch. The eagle was surprised but unharmed.

Reindeer Can See Hissing Spots On Power Lines

Reindeer in Lappland, Sweden (photo from Wikimedia Commons)

Have you ever been near a power tower whose lines are hissing? We can hear the electrical discharge but we can’t see where it’s coming from. Reindeer can see it!

You’ve probably experienced hissing power lines and wondered about the source of that noise. Sometimes the sound is so bad that it makes us worry. I remember hiking through a power line cut in Pennsylvania’s Laurel Highlands(*) where the lines were crackling. The sound was so spooky that I practically ran to the other side of that clearing!

Pylons in Briar Creek Twp, Columbia County, PA (photo from Wikimedia Commons)

The hissing is a corona discharge, the ionization of the air surrounding the high voltage conductor (wire). As electricity leaks into the air it creates hissing and crackling sounds and flashes in a spectrum we cannot see.

Since 2011 scientists have known that reindeer can see ultraviolet light. They’ve also noticed that reindeer avoid power lines by as much as 3 miles (5km). At that distance there’s no way the animals can hear the lines hissing so what is it? It’s flashing ultraviolet light!

Power companies use UV cameras to see the faults in their power lines so they can fix the leaks.

p.s. It turns out that most mammals can see some level of ultraviolet light. Humans and monkeys cannot.

(photos from Wikimedia Commons; click on the captions to see the originals. *NOTE: The tower photo shows a typical power line cut in Pennsylvania, not the one I ran across!)

Eight Tiny Reindeer?

Santa Claus at Christmas Parade, Toronto, Ontario, 2009 (photo from Wikimedia Commons)

“Twas the night before Christmas when all through the house not a creature was stirring not even a mouse.

… out on the lawn there arose such a clatter, I sprang from the bed to see what was the matter …

When what to my wondering eyes should appear, but a miniature sleigh, and eight tiny reindeer.”

excerpt from The Night Before Christmas, 1823 in The Troy Sentinel

24 December 2020

Miniature sleigh? Tiny reindeer? A human-sized Santa Claus needs a normal sleigh and full-sized reindeer to pull it. Just two reindeer take up a lot of space.

Santa in sleigh pulled by two reindeer, 2007, Torquay, UK (photo from Wikimedia Commons)

Imagine eight of these!

Reindeer to take part in Christmas festivities, Yate, UK 2004 (photo from Wikimedia Commons)

Reindeer (Rangifer tarandus), called caribou in North America, range in size from 5.3 to 7 feet long. Males weigh 350 – 400 lbs, females weigh 180 – 260 lbs. Both sexes have antlers though at different times of year.

Reindeer in Norway (photo from Wikimedia Commons)

These are not small animals. Eight full-sized reindeer and a full-sized sleigh would damage any house they landed on. Santa really needs tiny reindeer. Perhaps he went to Svalbard, a Norwegian archipelago between mainland Norway and the North Pole, to get them.

Like other island species the reindeer on Svalbard have evolved to a smaller size. If you need small reindeer they’re the smallest on Earth, only 50-60% the size of other caribou.

Problem solved.

Christmas lights, Etobicoke, Ontario (photo from Wikimedia Commons)

It’s safe for Santa to come tonight.

(photos from Wikimedia Commons; click on the captions to see the originals)

Take That!

Skunks and opossums are both nocturnal so of course they encounter each other on their nightly rambles. What do they think of each other? Do possums avoid skunks?

An encounter captured on a trail cam, tweeted by Russ McSpadden, indicates that a possum will whack a skunk if he thinks he can get away with it.

Take that, you pesky skunk!

Oh my!

(photos from Wikimedia Commons; click on the caption links to see the originals. Russ McSpadden tweet @PeccaryNotPig embedded showing Betsy Potter’s video)

Fox and Fisher

Red fox (Vulpes vulpes) and fisher (Martes pennanti) (fox by Mick Thompson on Flickr via Creative Commons license, fisher photo from Wikimedia Commons)

13 December 2020

What happens when a red fox starts to chase a fisher?

Fishers (Pekania pennanti or Martes pennanti) are fox-sized members of the weasel family, adept tree-climbers, and opportunistic hunters especially of porcupines. Uncommon in Pennsylvania, fishers disappeared because of over hunting but were reintroduced to northern Pennsylvania in 1994-1998.

Because fishers are scarce, most foxes (Vulpes vulpes) have never seen one and may mistake them for prey. That appears to happen at the start of this interaction, filmed by Becky Rowe in northern PA on 28 November 2020. Then the fox changes his mind.

By the end of their encounter it looks like they’re playing Chase Me. Fox and fisher having fun.

Thank you, Becky Rowe, for sharing this rare encounter.

(fox photo by Mick Thompson on Flickr via Creative Commons license, fisher photo from Wikimedia Commons; video from Becky Rowe on Facebook)

Giraffes and Gentoos Have Something in Common

Giraffes (southern) at Ezemvelo Nature Reserve, Gauteng, South Africa (photo from Wikimedia Commons)

What do giraffes and gentoo penguins have in common?

Though both were (or are) listed as a single species researchers say they should be four.

In 2016 DNA testing on giraffes revealed that the single species (Giraffa camelopardalis) is really four species. The proposed 2016 species split looked like this on the map …

Map of genetic subdivision in the giraffe based on mitochondrial DNA sequences (map from Wikimedia Commons)

… and is described as:

[Replace] Giraffa camelopardalis with four new ones: the southern giraffe (G. giraffa), found mainly in South Africa, Namibia and Botswana; the Masai giraffe (G. tippelskirchi) of Tanzania, Kenya and Zambia; the reticulated giraffe (G. reticulata) found mainly in Kenya, Somalia and southern Ethiopia; and the northern giraffe (G. camelopardalis), found in scattered groups in the central and eastern parts of the continent. The one remaining subspecies is the Nubian giraffe (G. camelopardalis camelopardalis) of Ethiopia and South Sudan. It is a distinct subspecies of the northern giraffe.

Scientific American, DNA Reveals Giraffes Are 4 Species–Not 1, 9 September 2016

This year a DNA study on gentoo penguins revealed that they should be split in four species, too.

Gentoo penguins (Pygoscelis papua) breed on Antarctica and islands in the southern hemisphere reaching as far as the Falklands, South Georgia and Kerguelen Island. Two populations are considered subspecies; they don’t intermingle. In 2012 the subspecies map looked like this:

Range of gentoo penguin showing subspecies as of 2012 (map from Wikimedia Commons)

The proposed split elevates both subspecies and adds two more!

The researchers suggest the two subspecies [P. p. ellsworthi and P. p. papua.] should be raised to species level and two new species created.

The four species we propose live in quite different latitudes – for example P. ellsworthi lives on the Antarctic continent whereas P. poncetii, P. taeniata, and P. papua live further north, where conditions are milder, and so it’s not that surprising that they have evolved to adapt to their different habitats.

Birdwatchers Daily, Split Gentoo Penguin into four species, researchers say, 4 Nov 2020

The split could be good news for the most vulnerable gentoo penguin populations since it would allow a focus on saving them.

Will the gentoo penguin officially split like the giraffe? We’ll have to wait and see.

(photos and maps from Wikimedia Commons; click on the captions to see the originals)

p.s. Locations of the four species as described as follows at The Conversation blog: We suggest the designation of four species of gentoo penguin: Pygoscelis papua in the Falkland Islands, P. ellsworthi in the South Shetland Islands/Western Antarctic Peninsula, P. taeniata in Iles Kerguelen, and P. poncetii, in South Georgia.

It’s Deer Season

Dumpster deer at the Bigelow Boulevard construction site, 22 Nov 2020 (photo by Kate St. John)

28 November 2020

Today is the first day of Deer Season in Pennsylvania. Specifically it’s the start of antlered deer regular firearms (rifle) hunting season which runs from 28 November to 12 December and includes Pennsylvania’s first ever Sunday rifle deer hunt on 29 November. Click here for season details; they depend on location.

Be sure to wear blaze orange in the woods and fields every day of the week.

Wear Orange sign (PA Game Commission), Blaze Orange Vest available on Amazon

In the City of Pittsburgh our huge and growing deer population has no predators. Hunting is prohibited and the deer know it.

Buck in velvet at Allegheny Cemetery, July 2015 (photo from Wikimedia Commons)

The only thing city deer are afraid of are dogs off-leash.

Deer cross the road in Schenley Park (photo by Kate St. John)

Last weekend I found a target-practice deer taking refuge in the city. Poking his head out of a pink dumpster on Bigelow Boulevard, he knew he was safe near the Cathedral of Learning (at top).

Stay safe out there.

(photos by Kate St. John and from Wikimedia Commons, PA Game Commission and Amazon. Click on the captions to see the originals)

Dolphins Are Polite In Conversation

Bottlenose dolphin (photo from Wikimedia Commons)

20 October 2020

We know that dolphins are intelligent and that their whistles and clicks are a form of communication. It was only a matter of time before we figured out part of what they’re saying. For instance …

Dolphins say their own names using a “signature” whistle.

In 2016 we learned that mother dolphins name their babies by speaking a new signature whistle — the baby’s name — a few days before the calf is born and for two weeks after birth. The calf learns the name its mother gave it and later names itself with its own signature whistle.

Bottlenose dolphins, mother and baby (photo from Wikimedia Commons)

Four years ago the Dolphins Plus research institute in Florida proved that dolphins talk to each other when cooperating on a task. Though they didn’t call this “speech,” the Karadag Nature Reserve in Ukraine later showed that dolphins speak in complete sentences of at least five words.

What amazed me most about that discovery is that each dolphin waited for the other one to complete its speech before responding. I’m impressed that dolphins are polite in conversation.

In my family we all talk at the same time. Though we don’t always hear what the other person is saying, we don’t get offended if someone speaks while we speak. It was many years before I realized the behavior is impolite and I still struggle to wait and listen.

I should take a lesson from dolphins.

Bottlenose dolphin (photo from Wikimedia Commons)

(photos from Wikimedia Commons; click on the captions to see the originals)

Cats Can Copy Human Behavior

Illustration demonstrating action and cat’s performance after “Do it!” Action A: (a) the owner raises her right hand and touches the box with it; (b) cat’s action scored as matching the demonstration of action A

4 October 2020

And now for something completely different — not a wild animal but a wild result.

Last week Science Magazine reported the first ever scientific proof that a cat can imitate human behavior. A Japanese cat named Ebisu demonstrated it in a “Do As I Do” experiment.

“Do As I Do” is a training technique in which the owner gets the pet’s attention, performs an action, and then says “Do It.” The animal learns that Do It means copy me and repeats the action.

Ebisu’s owner, Higaki, said the cat learned easily because of her high food motivation.

Higaki showed that Ebisu could copy familiar actions, like opening a plastic drawer and biting a rubber string. Then she asked the cat to imitate two new behaviors [for which she had not been trained]. While standing before Ebisu, who sat on a countertop next to a cardboard box, Higaki raised her right hand and touched the box. At other times, she bent down and rubbed her face against the box.

— Science Magazine Kitty see, kitty do: cat imitates human in first scientific demonstration of behavior

As you can see in the video, Ebisu watches her owner place her hand on the box and tap it. Her owner stands straight, then says “Do It.” Ebisu places her paw on the box and taps it, then immediately asks for a treat. Of course she gets one. Good Kitty!

In the photos below, her owner rubs her face on the box. So does Ebisu. Lead author Fugazza says this is remarkable because only dolphins, parrots, apes, and killer whales have so far been shown to imitate people

Illustration of demonstrating action and cat’s performance after “Do it!” command. Action B: (c) the owner bends down to rub her face on the box; (d) Cat’s action scored as matching the demonstration of action B

Skeptics say that Ebisu would have rubbed the box anyway. Really? Having lived with cats for most of my life I can tell you that getting a cat to do something on command is the tricky part.

Sadly Ebisu can no longer show off her talents. She got kidney disease this year and died in June. I know how hard that is. I’m sure Higaki misses her.

Read more about Ebisu at Kitty see, kitty do: cat imitates human in first scientific demonstration of behavior in Science Magazine.

(photos from Did we find a copycat? Do as I Do in a domestic cat (Felis catus) at Springer Link)

p.s. For a video of a dog trained to copy human behavior see the video in this article: Your Dog is a Copycat. The dog is even multi-lingual, trained in Italian but “Do it” in English. 😉