Winter’s coming and the crows are back in Pittsburgh.
Last week at dusk I saw 3,000 flying over Shadyside heading directly west, but I don’t know where they were heading.
Four years ago they roosted above the Strip District near 21st Street and Liberty Ave where Sharon Leadbitter captured them in this video. But there’s no guarantee that’s their favored place this year.
When crows become too annoying we humans apply just enough pressure to move them along. Sometimes they move a little, sometimes a lot. The year they quit the Strip District they chose an abandoned spot in the Hill District.
Where’s the crow roost this year? Have you seen it?
We need to know before Pittsburgh’s Christmas Bird Count on December 26 so we can count the crows.
A pair of ravens in Germany (photo from Wikimedia Commons)
We’ve all seen it happen. Two people fight in public, perhaps with only words and innuendo. When the fight is over, some of the bystanders console the victim.
This kind of consoling is a rare trait among species, especially when those involved have no pair bond. Humans and chimpanzees exhibit “affiliation behavior” but we thought it didn’t happen among birds until a 2010 report in PLOS One showed that ravens do it, too.
The Konrad Lorenz Research Station in Austria studies behavioral ecology and animal cognition, often focusing on the ravens whom they house on site. For the 2010 study, Orlaith N. Fraser and Thomas Bugnyar worked with a group of 13 young hand-raised ravens, some of whom were related.
Ravens live in dynamic social groups so, inevitably, fights break out. For two years the researchers tracked the winners, losers, and bystanders, and the intensity of the fights. The data showed that bystander ravens console the losers with whom they have a relationship — more so if the fight was intense. Sometimes the bystanders step in without being asked, sometimes the victims seek consolation. Interestingly, the fights were more likely to stop when the victim sought consolation from friends.
The study concluded that “ravens may be sensitive to the emotions of others.”
When highly intelligent birds are bored, watch out!
Keas (Nestor notabilis) are wild parrots on the South Island of New Zealand who love to explore and use their sharp beaks to open whatever they find. They’re not kept as pets because they literally will take your house apart.
Watch them take apart the police car.
Pet parrots invent similar projects when they’re bored. Give them something to do or they’ll destroy the woodwork!
p.s. This article was spawned by Ted Floyd’s mention of keas and Jack Solomon’s post of the police car video on Facebook. Thanks!
Cawing about … what? (photo from Wikimedia Commons)
In case you haven’t noticed yet, the winter crow flock is back in town. They’ve been in the East End of Pittsburgh since at least October 15 but our daily rounds have been out of synch with their activities until now.
Today, with sunrise and sunset an hour earlier, we’ll see the crows commuting during rush hour and we’ll certainly hear them. Why are they so loud in the morning? What the heck are they saying?
E2 at the nest perch, 24 Oct 2015 (photo from the National Aviary snapshot camera at Univ of Pittsburgh)
Yesterday Barbara Hancey asked if Dorothy and E2 are still at home at the Cathedral of Learning.
Yes, they are.
On campus my friend Karen Lang and I have seen at least one peregrine, sometimes both, several times a week. The birds are much less active than they are in the spring and they have very little interest in visiting the nest.
Like all birds peregrine falcons are sensitive to seasonal light changes. As the days get shorter their reproductive hormones cease and their interest in breeding — and in the nest — ceases, too.
The snapshots above (E2) and below (Dorothy) show they currently visit about once a week. This frequency will drop even further and won’t ramp up again until February.
Dorothy makes a quick visit to the nest,19 Oct 2015 (photo from the National Aviary snapshot camera at Univ of Pittsburgh)
(photos from the National Aviary snapshot camera at the University of Pittsburgh)
p.s. This is not an egg. It’s a reddish hole-punch that blew into the nest on the windy day, Oct 29.
Reddish hole-punch that blew into the Pitt peregrine nest on Oct 29, 2015
Juvenile bald eagle hunting for fish (photo by Chuck Tague)
For juvenile bald eagles the first year of life is the hardest. Fresh from the nest where their parents fed them, they’re off on their own hunting for food with almost no practical experience. Every day is a new challenge.
The first order of business is Learn To Fish, but that’s easier said than done. Fortunately they have other options. They can munch down on carrion, grab food from others, or even eat junk food.
“Down in the dumps” at the landfill (photo by Chuck Tague)
For starters, 10% of the landfills were really popular and garnered 75% of the bald eagles’ use. The landfills closest to eagle roosts were the favorites. I imagine eagles like the convenience of a breakfast or bedtime snack.
Landfill use was much more common among the young. Compared to adults, hatch year bald eagles visited 6 times as often, second year birds 4 times as often, and third/fourth year birds 3 times as often as adults. Even so, there were individuals in various age groups who were obviously hooked.
It appears that bald eagles give up the landfill habit as they get better at fishing.