I held forth on the fake eagle video thing at some length over here at KCET yesterday, but there was something I didn’t mention there that irked me about the hoax: in the recap part, where the “amazing footage” of the “eagle” “catching” the “child” gets “replayed” in slow “motion,” the filmmakers dubbed in a bit of sound effect right at the moment where CGI talon hit virtual toddler.

And of course it was a red-tailed hawk call. It always is, It doesn’t matter what bird of prey is in a film: the SFX guys will always dub in a red-tailed hawk call. 

Not that the red-tail sound was a dead giveaway: during the 45 minutes or so in which I was somewhat taken by the hoax in I was prepared to grant that perhaps the videographers just did a clumsy, misguided dubbing job, for much the same reason that nature YouTubers always seem to want a horrible music track to cover up their occasionally interesting footage. But it was the same kind of mistake as inflating a CGI osprey to eagle size and calling it a golden and expecting birders to believe it for a second.

In case you’ve never seen a bird of prey represented in video and have no idea what I’m talking about, here is a red-tailed hawk’s call:

By way of comparison, here’s what golden eagle vocalizations sound like:

Bald eagles have calls you might well mistake for a gull’s:

[Update: in comments, otrame offers a more characteristic adult bald eagle call.]

Almost without exception, the red-tailed hawk call is what the sound engineers will use. I do know of one such exception. In the 2010 remake of Clash Of The Titans, which I suspect most people here watched solely for the Kraken and the releasing thereof, there was a scene where Zeus and Perseus were having a difficult father-son moment. Perseus is recalcitrant, whereupon Zeus transforms himself into an eagle and flies away. And that eagle doesn’t “keeeer” — he peeps. Like a golden. Honestly, that one moment of verisimilitude was worth the preceding hour. I was impressed that they got that one detail right. Though the Kraken did disappoint.

Exemplary efforts like Clash Of The Titans aside, it seems like there’s a secret world law governing natural sounds in TV and film that requires all raptors sound like red-tailed hawks. All rats squeak incessantly. Horses whinny while chewing placidly. Tropical rainforests in Africa and South America always have kookaburras in them. And as soon as you start to pay attention to how things actually sound in the real world, that kind of mistake unsuspends your disbelief pretty damned quickly. It’s a bit like having a scene where John Wayne is leading a wagon train westward to Oklahoma City, and they pass the Tetons on the way.

It’s the natural world version of illiteracy, and it makes those of us who know a few things wince.

I spend a lot of time paying attention to threats to the organisms that live in the desert, and what with all the environmental bad news available online these days that can be pretty damned depressing. This past weekend, though, I was reminded that there is actually hope for the future. Centuries from now we may well find that desert plants, especially those that now live within a day’s drive of Los Angeles, have a vital role to play in making yet-undiscovered planets habitable.

I was reminded of this while re-watching a set of documentary films describing the terraforming of an entire complex system full of dozens of more or less habitable planets, in many cases using entire vegetative suites once native to the California desert. I’ve gone back and taken some screenshots of these films to illustrate some of the ways in which the terraformers used desert plants, and they — along with discussion of the terraformed vegetation –are below the fold.

[Read more…]

I know it’s early, but I expect it to be the best thing for a few days yet. David Byrne writes about his love affair with sound, and I came away from it feeling like I’d both learned something new and that it fit well with other ideas I already had — it was a revelation to see how well music and evolution fit together.

Because music evolves. Byrne’s thesis is that it evolves to fit its environment (sound familiar?), and that you can see the history of a genre of a music in its sound. It’s all about the spaces it was played in, which shapes the kind of sound can be used effectively…and he makes the strong point that you can’t fully appreciate the music of a culture or a time when you transpose it to a different space. He goes through all kinds of music, from medieval chants (cathedrals!) to hip hop (cars!). The iPod isn’t just a passive delivery system for generic music, it influences how music will sound — ear buds represent a completely different sonic environment from a cluttered dance club.

Apparently, David Byrne is an Ecological Developmental Biology kind of guy. I like him even more already.

Because that’s what eco devo is all about. Development and environment are all intertwined, with one feeding back on the other — species are products of the spaces they evolved and developed in, and cannot be comprehended in isolation. It’s one of the weird things about modern developmental biology, that we preferentially study model systems, organisms that have been able to thrive when ripped out of their native environments and cultured in the simplified sterility of the lab. My zebrafish live now in small uncluttered tanks with heavily filtered water; their environment is like iPods, simple, streamlined, focused with relatively little resonance. The zebrafish evolved in mountain streams feeding into the Ganges, in lands seasonally flooded by great monsoons, a vast and complicated opera hall of an environment. A wild zebrafish and a lab zebrafish are two completely different animals.

Oh, look. I have a new metaphor for issues I’ve been thinking about for some time. Thanks, David Byrne!

I might just make his essay part of the readings for my developmental biology course next term.