Crow he went a-fishing

December 10, 2015 • 11:00 am

by Matthew Cobb

This hooded crow in a park in Ramat-Gan (near Tel Aviv) appears to use bread to catch a fish.

This video was first posted in 2000 by Dr Oren Hasson, and has just popped up on Imgur and Tw*tter. You can read Dr Hasson’s description of the behaviour here. Hasson gives some references to previous observations of bait fishing in herons in Japan and Florida. I presume it was the kind of behaviour shown in these two videos:

This heron in a Mauritius park is using a cigarette butt in the same way.

This heron (location unknown) is trying a similar thing with some bread, but it takes a while before it gets it right (maybe it’s a young bird?)

So what did birds use before bread and cigarette ends? Here’s Dr Hasson’s thoughts about how ‘his’ crow began fishing. He’s also particular sharp in the third paragraph, where he ponts out that the bird is giving up something it can eat (bread) in order to get something else (a fish) which is presumably of higher value.

In addition to this particular pool, there is a large artificial pond in the park, in which there are many fish. Fishermen regularly arrive to this pond to fish. Little egrets, night herons, pied kingfishers, kingfishers, and white-throated kingfishers are among the common fish-eating birds that hunt fish in it, and there are a number of places that could be used by crows as a perch to catch fish. So there was a chance that this behavior was practiced by many crows, depending, perhaps, on how long ago was it first learnt. To test this, I spread slices of bread all over the park to see how crows handle them. The result was that crows do what crows do, namely, they ate all pieces of bread on the spot. It was only near that particular small pool that I have seen this phenomenon again. As this was at the beginning of the crows breeding season, and as there were two nests that were built at the time on two adjacent sycamore trees next to the pool, I suspected, by following these unmarked crows, that there was only a single crow, possibly two (one of each nest), which are using the bait-fishing technique. One way or another, it was a rare phenomenon.

Altogether, my own bait, slices of bread spread around the pool, worked well. I have seen about 10 crows’ attempts to use bread bait to lure fish, all on the very same perch, and 4 of them were successful. I managed to document two of them, one with my 200 mm camera (photos on the top-left corner), the other with a very good digital video camera recorder that I rented for this purpose. Given my equipment, and given that the crow was not tame enough to fish when I was at the edge of the pool, the only way I could do this was by leaving my camcorder continuously recording on a tripod, while watching the pool from a distance. The two wmv files that I put here, are the result of this low-tech effort. One shows an unsuccessful attempt, the other a successful one, pretty much like the first time I saw the crows doing it. Observations were made during March, 2000, except for the time I videotaped it, which was on April 5th, 2000.

Crows of Caledonia are known to prepare sticks and adjust their size, or bend metal hooks for hunting larvae in wood. Ravens are known to pool fishermen’s bait out of the water, and steal their fish. Crows all over the world are known to lift up pecan nuts and drop them on the road to crack and eat them. They are also known for using this technique to break clams on rocks. However, giving up bread in order to gain fish is unique, mostly because the crow gives up some resource it owns (food), not just expending energy. Admittedly, it retrieves most of the bread and eats it before it gets lost. Admittedly, it may not understand the fish will eat the bread. But clearly, it did not need to soften the fresh bread that I put their just a while ago, and it lost some of it in the water. In the end, when it catch the fish, it does not hesitate leaving the bread behind, to fall in the water. Did it expect to eventually lose its bread when it brought it to the pool (rather than just expected to gain a fish)? – This is really difficult to tell. However, as much as can be seen, this was a deliberate behavior, and very special. Regarding whether it qualifies for the definition of tool-using, maybe it does. It took a slice of bread, held it in its foot, and put only pieces of it in the water. As shown in the video, it seems as though it even deliberately adjusts size and rate of the crumbs it dropped in the water, according to the presence or absence of fish in the water next to its perch. However, more data should have been gathered to determine that.

There are other birds known to use bait to lure fish, the most famous among which is the green-backed heron, which drops insects in the water. In those birds the trait is known to be heritable, being improved later by experience. In the hooded crow it is much more likely to be a self learnt behavior by one individual, maybe copied by another, than a rare lucky mutation.

 

Iran’s forcible “sex-reassignment” surgery for gays

December 10, 2015 • 9:45 am

The television program that inspired the Twit**er exchange at the bottom of this post actually aired in April, but I didn’t learn some things about Iran’s odious policies towards homosexuals until I investigated that exchange yesterday, when Knight rebuked the first gentleman on Twi**er for his gross misunderstanding of what’s actually happning in Iran.

We all know that homosexuality is a legal offense in some Middle Eastern countries, as it violates Islamic law—law set out not in the Qur’an, which is unclear on the issue, but in the hadith. In Iran, homosexuality has been illegal for over eighty years, but in fact was tolerated under Shah Reza Pahlavai.

That all changed when the Shah was deposed in 1979 during the Islamic Revolution, and homosexuality and transsexuality became crimes punishable by death. Seven years later, though, transsexuals were legally reclassified as “heterosexuals.” Since gays were lashed and then executed if the whip didn’t prove a deterrent, this new policy opened a legal path for gay males to continue having sexual relationships with men. But that meant having their penis and testicles cut off, and living transgendered—as a woman.

Since we know now that being gay is not a “choice” but a behavioral imperative—and one that does not respect national boundaries—gay Iranian males either must to repress their behavior, exercise it in secret at risk to their lives, flee the country, or get sex-reassignment surgery and live as females. Many apparently choose the last option, but clearly that’s a choice made under coercion, one carrying serious medical risks. As the YouTube description notes:

Post-revolution Iran is notorious for its religiosity: when Ayatollah Khomeini came to power in 1979 he enforced strict Islamic custom that made homosexuality punishable by death. Surprisingly, though, the state treats transsexuals differently, allowing sexual reassignment surgery and in some cases even paying for it. It’s become so widespread there, in fact, that Iran is now one of the world capitals for the procedure.

But the fatwa allowing the surgery has a grim drawback: families, therapists, and the state see gender reassignment as a solution to the “illness” of homosexuality—not understanding the risks of forcing the long, life-changing process of a sex change on someone who wasn’t born wanting it. Gay Iranians now face the agonizing choice of fleeing their communities or permanently changing who they are.

A VICE program on the issue was commissioned by HBO and aired last April; the entire program is embedded below. Do watch it if you have the time, for its coverage of the issue is thorough, including personal, religious, and medical issues. It also shows that women are forced to undergo the procedure as a way to become “legal lesbians”.

Seeing homosexuality as an illness that can be “cured” by surgically refashioning the genitals of gays is certainly not an enlightened policy. Gays should of course have that option, but it’s clear that many Iranian gays get the surgery as their only viable option to either death or exile. Thus, the tweet by the first “gentleman” at the very bottom of this post—I use the term very loosely—was based on either duplicity or sheer ignorance.  That person implies that Iran’s policies toward LGBTQ people are enlightened, with the government actually favoring and subsidizing sex-change operations to help gays. But of course that’s not the situation at all: it’s largely a form of punishment, and a severe one. It’s done not to help gays, but force them to conform to religious dogma.

Those Westerners who ally themselves with Muslim extremists holding odious views like the ones discussed here, and who claim to do so on grounds of favoring the oppressed, should realize who they’re getting into bed with. That was, for instance, the mistake made by the Feminist Society of Goldsmiths College when they—and, ironically, its LGBTQ+ Society—allied themselves against Maryam Namazie and with the Islamic Society, whose own president opposes equal rights for women and gays.  That president, Muhammed Patel, has since resigned after his homophobic tw**ts came to light. Here are two of them:

Muslimsoc2_640x345_acf_cropped Muslimsoc1As Stephen Knight commented:

A pervasive strain of toxic western feminism is on show here. It seems they hold two books for equality: One for themselves, and one for the browner, less ‘them’ people. Like Namazie, they should be screaming from the rooftops about the oppression visited on women in the name of Islam. Instead, we have an instance where a group of men openly harassed and intimidated a woman minority (Iranian ex-Muslim), and the feminist society chose to stand with her aggressors. ’Feminists‘ siding with Islamists is akin to PETA sponsoring your local steak night. This is an utterly shameful display of moral confusion.

The double standard also applies to the Goldsmiths’ LGBTQ+ers. How dare they ally themselves with a society whose president (along with many of its members) opposes equal rights for gays, issues homophobic tweets, and stands against Namazie, who favors LGBTQ rights? What sort of twisted doublethink could create such behavior?

Well, we know. It’s the doublethink that says it’s okay to deny gays and women rights so long as oppressed “people of color” are doing the denial. It’s the doublethink espoused by the first gentleman in the tw**t below.

Actually, the Advocate site mentioned by Stephen Knight (“Godless Spellchecker”) is no longer the one in the link above; rather, it’s here. 

Finally, you might find this exchange with Ali Rivzi enlightening and amusing.

 

Review: “45 Years”

December 10, 2015 • 8:45 am

SPOILER ALERT: Some plot revealed, but it doesn’t much matter for this movie.

This isn’t a full review of the new movie “45 Years,” which I saw last weekend, but rather a brief summary and a very strong recommendation that you see it. Starring two wonderful actors, Charlotte Rampling and Tom Courtenay, it’s based on a short story by David Constantine. Rampling and Courtenay play Kate and Geoff, a British couple married for nearly half a century (ergo the title) and looking forward at the end of the week to an anniversary celebration with their friends. The party was a delayed celebration of their 40th anniversary, interrupted by Geoff’s bypass operation.

During the week, Geoff gets a letter saying that the body of his long-ago girlfriend Katya, killed in a hike on a Swiss glacier, has come to light under the ice. (Imagine seeing the body of someone you dated 50 years ago, preserved exactly as she was, while you’re now a decrepit old man.) It turns out that Geoff got the letter because he was named as the girl’s next of kin: to get lodging in Swiss inns, they had to pretend they were married.

This disturbs Kate, who didn’t know about the marriage pretense, and, as Geoff begins to behave weirdly—staring to smoke, being distracted, and not looking forward to the party—she quickly realizes that that long-ago relationship meant far more to Geoff than he ever let on. She asks him if he would have married Katya had she not died, and he answers “yes.”

Kate then investigates his belongings in the attic and comes across something that makes her realize exactly why Geoff was so fixated on Katya. The changes that both Rampling and Courtnay go through during the week are wonderfully acted, culminating in the couple having it out (not fully—they’re British after all) and Geoff vowing fealty to his wife. Near the film’s end, you think all will be well as Geoff makes a loving toast to Kate at the party. But all will not be well: it’s clear as the film closes that Kate will always wonder if Geoff has been honest to her during their 45-year marriage, something she clearly shows not with words, but with fleeting facial expressions.

It’s curious that none of the reviewers have compared this movie to James Joyce’s The Dead, my favorite piece of fiction in English. Both the movie and novelette have similar plots: a man (in Joyce) or a woman (in “45 Years”) discovers that their partner is still fixated on a long-dead lover from their youth, and both are left wondering whether their marriage has been largely a sham, and the love of their partner always tainted by the greater love of an earlier partner. The parallel is obvious and strong.

Here’s the movie’s official trailer; it will give you a flavor of the film, which gets a rare 98% rating on Rotten Tomatoes. Do see it if you can; it gets Professor Ceiling Cat Emeritus’s highest movie recommendation:

Readers’ wildlife photographs

December 10, 2015 • 7:30 am

We’ll start with a few of the many photographs I got from reader Damon Williford:

This is from Estero Llano Grande State Park in the Lower Rio Grande Valley of Texas.

Eastern Fox Squirrel (Sciurus niger):

2015-11-22 Eastern Fox Squirrel (Estero Llano Grande State Park)

Great Kiskadee (Pitangus sulphuratus):

2015-11-22 Great Kiskadee 2a (Estero Llano Grande State Park)

Long-billed Thrasher (Toxostoma longirostre):

2015-11-22 Long-billed Thrasher 2 (Estero Llano Grande State Park)

Plain Chachalacas (Ortalis vetula):

2015-11-22 Plain Chachalacas (Estero Llano Grande State Park)

Reader Mark Sturtevant sends us some arthropods:

I had been trying my hand at taking pictures of insects in flight. My equipment is limited in being able to stop high speed wings, and to even frequently get the subject into proper focus, but I consider some of my efforts to have a certain beauty (at least to me). Besides, the great Alex Wild has done similar things, although his are certainly better:

The first is of the Eastern carpenter bee (Xylocopa virginica). I think you can see my reflection in the abdomen.

1flyingbee

Next is an unidentified bee.

3flyingbee

Finally, this is a long-legged fly (Condylostylus sp.) that was hovering over another long-legged fly. My guess is that it is a male checking out a female.

5FlyingLongLeggedFly

Finally, a rare animal from reader Mark. The photo isn’t great, but the animal is!:

My co-worker went hunting over the weekend.  No deer came within range except when she was not prepared for it,  However, she did a white splosh in the distance transform into an albino deer.  This was taken in southern Illinois somewhere with her cell phone camera.
Albino deer Mark

Thursday: Hili dialogue

December 10, 2015 • 5:00 am

Another warm day in Chicago lies ahead, with highs of 58°F (14°C), and it will get up to 60°F by the weekend. It’s almost spring weather! On this day in history, Martin Luther publicly burned his copy of the papal bull (was he having a barbecue? I’ll be here all week, folks.) In 1884, Mark Twain published Huckleberry Finn, the book that, according to Ernest Hemingway, is the beginning of all American literature. And, in 1896, Alfred Nobel, the Father of the Mother of All Prizes, died (curiously, on this date in 1901, which may not be coincidental, the first Nobel Prizes were awarded). As I child I dreamed of getting that Prize, but sadly, it’s too late, I’m not famous enough, and they don’t give them in evolutionary biology anyway. Meanwhile in Dobrzyn, Hili is warming her butt on the printer and being as solpsistic as usual. We live in a Hilicentric solar system.

Hili: I’m thinking about an ideal democracy.
A: And do you have any definition yet?
Hili: Yes – when everybody agrees on a compromise that is exactly as I want it.

P1030662

In Polish

Hili: Zastanawiam się nad idealną demokracją.
Ja: I masz już jakąś definicję?
Hili: Tak, kiedy wszyscy zgadzają się na kompromis, żeby było tak jak ja chcę.

Some surprising sums—and a challenge

December 9, 2015 • 2:45 pm

by Matthew Cobb

This was tw**ted earlier today:

There are five other sums (equations?) that give the same answer. Can you find them? Post your answers below.