Jason on me in D.C.

May 29, 2015 • 9:30 am

As Jason Rosenhouse promised, he has a report on my book talk in D.C., a report tersely called “Coyne in D.C.“. It’s a Coyne-ian report, complete with pictures of cats and noms! Jason is no sycophant, and has a few words of constructive criticism, which I’ll ponder, about answering questions by angry people. He may be right, and my response to such people may be unduly testy because I’m picking up on their anger. As I said, I have to learn to understand where these people are coming from, and that understanding may lead to a more empathic response.

So thanks to Jason, and I hope he’ll write more about science and religion on EvolutionBlog in the future. I hear tell he’s got a good post coming up along those lines.

Readers’ wildlife photographs

May 29, 2015 • 8:00 am

A melange today: birds, landscapes—and a cobra!

First we have some lovely bird photos from Pete Moulton:

Unfortunately, my plans to get out and make some new images for you over the holiday weekend didn’t work out very well, so these are mainly somewhat older images that I had stashed in the sock drawer, as one of my photo buddies terms her archived material. There’s a little bit of a theme here because I’ve been thinking about a post biogeographer Alan de Queiroz published at his website, The Monkey’s Voyage, back in August. Alan’s post concerned the ‘New Nature’ expressed by naturalist/science writer Lyanda Lynn Haupt, as opposed to the more hardcore pro-conservation ideas of EO Wilson and others, and specifically dealt with the issue of introduced birds. Rather than rehashing the entire post, though, I’ll just give you the link because Alan’s a far more gifted writer than I am.

But I’ve come to realize that the issue isn’t strictly one of introduced vs native species; what about those species which once occurred natively in a particular region in small numbers, but which have increased along with–often because of–human activity? Surely those must count as ‘introduced’ in some sense too. So, here are some of the species which have increased in, or expanded into, the Phoenix area along with, and often because of, human development.
Surface water’s always prime real estate for both birds and humans. Some people like to fish, and now ponds and lakes exist where none did before. That’s increased our local population of Pied-billed Grebes Podilymbus podiceps, which are so water-adapted that they can hardly walk on land. This is one in its breeding colors last June at Papago Park. He’s the boss of the pond, and all the other birds know it.
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And, of course, we must have a Green Heron (Butorides virescens), just because. Under normal circumstances, Green Herons are fairly secretive, but at the Phoenix area parks they’ve become reasonably acclimated to humans, which makes them stellar photo subjects. This one wanted to primp a little before sitting for its portrait.
GRHE 8-3-14 Papago Pk 3184
The water attracts other herons too. This one’s an adult Snowy Egret, Egretta thula.
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And, now to the poster children for this effect. This one’s a male Anna’s HummingbirdCalypte anna. Before about 1960, Anna’s was a sparse migrant and winter visitor in Arizona, but with the development of the Phoenix area and the proliferation of backyard hummingbird feeders, it’s become our default hummingbird throughout the year. This increase has come at the expense of two other local species, the congeneric Costa’s Hummingbird C. costae and the Black-chinned Hummingbird Archilochus alexandri, because the Anna’s maintain territories year-round and get all the best spots for feeding and nesting, while the Costa’s and Black-chinneds only come in for the nesting season, and get marginalized to suboptimal areas.
ANHU_1-1-12_GWR_1903
And the Neotropic Cormorant Phalacrocorax brasilianus. When I moved to Phoenix in the mid-1980s Neotropics were quite uncommon in Arizona, and usually necessitated long trips to Painted Rock dam or Patagonia Lake on the off-chance of seeing one. Nowadays, this is the default cormorant at a number of locations around Phoenix and its suburbs, and the overall population is about equal to that of the Double-crested Cormorant P. auritus. To be fair about this, global climate change most likely has a lot to do with the Neotropic’s expansion into Arizona, as NW Mexico is suffering a drought even more severe than ours, and many of the Neotropic’s customary habitats in Sonora dried up just as humans were creating habitat for them in Arizona. The expansion isn’t finished yet, and Neotropics are now being found in southern Nevada and eastern Colorado.
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Finally, Stephen Barnard demonstrates once again that he lives in paradise, which is apparently situated in Idaho.

I drove The Beast to Stanley and back yesterday, to open the cabin. Discovered that the tiny windshield wipers sort-of work when I hit a thunderstorm coming back. A fellow Cobra fan recommends Rain Shield and go faster.

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Also, a colorful sunset this evening.

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In London on June 11? Come and hear The Story of Life at the Royal Institution.

May 29, 2015 • 5:33 am

by Matthew Cobb

Professor Ceiling Cat is travelling, so I am using the opportunity to indulge in some shameless self-promotion. As regular readers will know, my book Life’s Greatest Secret: The Race to Crack the Genetic Code is out in June in the UK (Profile Books) and in July in the USA (Basic Books). To launch the book I’m doing a talk with my friend and fellow-Profile author, Nick Lane, on Thursday 11 June at 7:00 pm. Nick’s book The Vital Question: Why Is Life the Way It Is?, published last month, has rightly been gaining rave reviews all over the place. The talk is at the Royal Institution (motto: “Science Lives Here”) on Albemarle Street in the centre of town.

The blurb for the event says:

How was the code of DNA cracked? How did it confirm the theory of evolution? And why did life evolve the way it did? To celebrate their ground-breaking new books, Matthew Cobb and Nick Lane will come together to unravel the tangled story of DNA and answer the vital question: why are we as we are, and why are we here at all?

We will each give a short talk, with plenty of time for discussion. It isn’t free, I’m afraid (£12 with £8 for concessions – OAPs, disabled, students etc) and you need to book tickets at the RI website. Hope to see you there – please come and say hello!

 

Friday: Hili dialogue

May 29, 2015 • 5:29 am

Today I head back to Chicago for about five days before heading to Vancouver for the INR5 meetings, which I’m really looking forward to. Those people really know how to run a meeting: good speakers, schedule not too heavy, a great audience of interested and secular folks, and, last but not least, great noms! After that I’ll be speaking in Toronto for the Centre for Inquiry, and soon thereafter starting the Big Road Trip. It will be a busy summer. Meanwhile in Dobrzyn, Hili is making a virtue of necessity about her role as a top predator in ecology and evolution (her latest weight is 4.8 kg, about the same as last year):

Hili: I’m a responsible agent of natural selection.
A: Do not overdo it, think of your figure.

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In Polish:
Hili: Jestem odpowiedzialnym agentem doboru naturalnego.
Ja: Nie przesadź, myśl trochę o swojej linii.

Book talk: Politics and Prose

May 28, 2015 • 3:59 pm

Jason Rosenhouse said he’d publish a report on his Evolution Blog about my talk last night at Politics and Prose in Washington, D. C. His report will surely be more objective than mine, but I thought I’d put up a few photographs of the event taken by reader Brian D. Engler, and a few thoughts.

Politics and Prose is a very famous independent bookstore on Connecticut Avenue in Washington, and has lots of book events, many with well-known authors (Ralph Nader spoke the night before I did, and apparently people are still chewing him out for taking away Democratic votes!). It’s a lovely store and they set up chairs and a lectern (and book-signing table) in the rear of the store.

I talked for half an hour without slides, speaking for about 15 minutes about how the book came about, what I discovered in my adventures in reading theology, and then gave a brief precis of what the book was about. You can see the setup below, showing about 30-40% of the audience. I was gratified that so many people were interested in the topic.  The bookstore moderators and workers were very gracious, and they know how to run an event (the woman in charge, whose name I’ve unfortunately forgotten, is sitting in the chair at the left background).

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I was quite exercised at times, though I hope not strident. The audience seemed attentive, and was more of a “choir” than the audience at my talk at Chicago’s University Club. But they were by no means all in favor of what I said. In the Q&A, several people wanted to talk at length, not so much to ask questions as to reprove me for my thesis. The rabbi I mentioned earlier said that he could still be a rabbi and not teach anything supernatural, but that he taught instead about morality and meaning. He added that if I understood Judaism better I would understand how to find spiritual truth. I wasn’t clear what, exactly, he was trying to say, but rather than battle with him, I just said that if he could help people without invoking divine beings then that was fine with me. He added, though that he could also discern religious “truths” through faith alone. I asked him to name one. He couldn’t really, and perhaps I should have said that he wasn’t really a supernaturalist but a secular humanist. At any rate, his long tirade (not a question; I must learn to tell people to ask questions rather than bloviate at length) seemed aimed at telling me that if I were a better Jew, I would learn that faith could bring truth. I could have engaged him further, but there were people in line (many of them) with real questions, and so I ended that discussion.

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One woman, a nurse, also wanted to speak at length without having a question. She said that she couldn’t go to work every day without having faith that she was helping people, and also that some people were sustained by faith in their time of need. Finally, she said that she knew that prayer and faith had cured several of her patients. My response (she was quite exercised) was that her “faith” was really “confidence based on experience in her own abilities and in medical care”; that yes, people’s faith could make them feel less anxious; but that studies had shown no value whatsoever in either faith healing or prayer in helping people get better. I told her to read about those studies in my book.

Several people seemed to conflate religious faith with other kinds of faith. One person asserted confidently that when he reads a science book, he has the same kind of faith in the scientist that he does when listening to a preacher or reading scripture. Ergo, he said science is based on faith. I told him that I discuss exactly this question in the book, and that the “faith” we have in popular science writers like Brian Greene, Richard Dawkins, Lisa Randall, Brian Cox, and so on is not the same as believers have in clerics: those scientists have attained renown because their work has been continually vetted by other scientists. It seems to be a common misconception that faith in what a scientist or doctor says is exactly the same kind of faith that believers have in their priest. The difference, of course, is that there is no way for the pronunciations of  a cleric to be checked and verified reliably by other clerics. (Or, if they were, they’re likely to be repudiated: imagine an imam pronouncing on the validity of what the Pope says!). I wrote an article in Slate on this very issue (part of which appears in my book), and I hope people can think harder about the different meanings of the word “faith.”

Perhaps one of the most common criticisms of science by believers, then, is that, like religion, it is based on faith. I interpret this to mean, “You are as bad as we are.”

I enjoyed chatting with many people at the book signing (about half said “Maru” and asked for a cat drawn in, so I know I have lots of readers whom I haven’t met). Many were also nonbelievers (i.e., the “choir”), and thanked me for the book or my website. One guy brought a laminated picture of his cats (he once had eleven) and gave it to me, which was sweet; and a woman gave me a CD she made which, I believe, contains music or art based on the fossil record. I spoke to several people as well who were “closet” atheists, groping to find a way to become more public.  I always tell them to take their time, that nobody will force them to declare their atheism. Several of them faced ostracism from friends and family if they declared their unbelief. I could see that they were very distressed about this, and I thanked Ceiling Cat that I never had to face that problem.

The book-signing:

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Someone told me the other day that the work that we’re doing as secularists may not bear fruit for decades in America, and I think that’s right. We won’t see an America anything like Sweden in our lifetimes. Speaking with another reader after the signing, I told him that sometimes I felt like a workman on a Gothic cathedral—someone who knows that the edifice on which he’s working will never be completed in his lifetime, that he’ll never see the final splendor of Chartres or Notre Dame. That is a bit depressing, because we won’t be around to see a wholly secular America, and we certainly won’t see it from Heaven! But I am convinced that one day it (I mean the secular America, not Heaven) will come.

On the swift’s scuttly wingless fly friend

May 28, 2015 • 3:52 pm

by Matthew Cobb

Earlier today I posted a video of a pair of swifts that met up for the first time in 9 months. In the comments, Mark Sturtevant pointed out that on the male (the front bird) you can see an ectoparasite scuttling about:

swift

Here’s the video again. Go to 50 seconds, which is about the first moment you can see the parasite, as a white blob on the back of the male’s neck. It starts scuttling around and can be clearly seen at around 1:10.

Chat on the comments and on Twitter identified the beast in question as probably Crataerina pallida, a wingless fly like the wingless bat louse fly Jerry posted the other day. Morgan Jackso (aka @bioinfocus) has gone on to pose some interesting questions about this particular fly over on his website Biodiversity in Focus.

You should head over there to see the full argument, but Morgan’s starting point is that this species does not lay eggs, but instead gives birth to live maggots, that presumably overwinter as pupae in nest boxes:

This leads us to an interesting question of how this louse fly got onto this bird! The fly was already aboard the bird when it entered the box (if you watch closely you can see a white blob that moves around neck is first visible at 0:06, immediately after the male bird approaches the sitting female). This means that one of two things happened: either the male bird has in fact carried its little parasite friend down to Africa and back (something that neither Hutson nor Walker & Rotherham (2010) believe to be the case) (and assuming this was the first nestbox that the bird stopped in, which I take to be the presumption of the ornithologists who posted the video and stated it shows a male reuniting with its mate from last year in last year’s nestbox), or alternatively, the male bird did stop for a time in another nestbox where it picked up its little hitchhiker, and then proceeded on to its longterm mate.

Curiouser and curiouser. Even more curiouser, as we were chatting about this on Tw*tter, the BBC programme Springwatch showed a video of their swift cam, showing a brooding female, who also had one of these beasts scuttling about on her. Lewis Spurgin, who ID’d the beast on our post, said:

https://twitter.com/LewisSpurgin/status/604009504343244800

If you have expert knowledge on this, please chip in below, and on Morgan’s site!

Cooperative hunting in groupers and moray eels

May 28, 2015 • 11:43 am

Here’s a short video from Nature that isn’t based on a single research paper, but on the continuing work of Redouan Bshary, a biologist in Switzerland who studies interspecific communication and behavior in fish.  The article itself, a summary of Bshary’s work written by Alison Abbott, is called “Animal behaviour: Inside the cunning, caring and greedy minds of fish“, and deals largely with the relationship between cleaner wrasses and their “cleanees.”

It turns out that this relationship is far more complex than the simple symbiotic relationship I’ve always taught (“cleaneee gets dead skin and parasites removed, cleaner gets a meal”). There is cheating by the cleaners, punishment by those fish who get a bum job of cleaning, and all kinds of complex social dynamics.

The video accompanying the article, however, deals with a different interspecies relationship—that between groupers and moray eels who seem to hunt “cooperatively”:

Now from the video alone, it looks as if the grouper is getting all the benefits, using the moray eel to flush prey for him (note that this also involves the moray leaving the safety of its den in the reefs). The experiments shown at the end demonstrate learning ability in groupers, but one question is missing in all this: What does the moray get out of it?  This behavior would not evolve (or persist, if it’s not genetically based) if both species didn’t derive some benefit from it. My immediate reaction would be that the moray gets some noms, too, but this isn’t mentioned in the video, which seems to show that all the benefits devolve to the grouper.  A better video would explain the benefits to both partners.

One alternative, which I find unpalatable and not biologically sound, is that the groupers are enslaving the morays as sort of a hunting d*g, to flush prey for them.  In this scenario the moray gets nothing. However, in nature we don’t see this kind of slavery very often, though it’s the norm for humans and their d*gs.

h/t: John

Swifts reunited

May 28, 2015 • 8:18 am

by Matthew Cobb

Spring is about to give way to summer in the northern hemisphere, and the swifts are back! My favourite bird, the swift (closely related to the nightjar, don’t you know) arrives in Europe at the beginning of May. They produce one clutch of eggs, and then return to Africa in the middle of August. They appear to mate for life, and to return to the same nest box. This charming and apparently unique video from a swift nest-cam shows the moment when a pair meet again, for the first time in nine months.

The video was recorded by staff at the charity BirdLife, who have had a swift nest box and cam installed on the side of their building in Cambridge. The video was recorded from the monitor rather than directly from the camera feed, so initially you can hear sounds from the office.

Although it looks like this is the moment the pair were reunited, we can’t be sure. The BirdLife website is rightly circumspect and says it “most-likely shows a pair re-affirming their bonds in preparation for nesting”. The reasons for this supposition are as follows:

According to local experts, the ‘wing flapping’ behaviour exibited in the video is a way of stopping aggression when the two meet again or when a bird attracts a new partner. However, courtship and encouraging a new prospective partner to use a nestbox are usually rather more drawn-out affairs than the behaviours displayed here, thus it is very likely that this is last year’s pair meeting up again and re-affirming their bond.

Whatever the case, the video gives a unique insight into how these birds interact. My assumption is that the recognition involves sounds and smells, (swifts have huge nostrils) but who knows?