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National Wildlife Health Center determines cause of blackbird death

Illustration for article titled National Wildlife Health Center determines cause of blackbird death

The blackbirds that fell out of the sky on New Year's Eve in Arkansas were brought to the National Wildlife Health Center lab in Madison, Wisconsin. After examining the bodies, officials say they've determined a cause of death.

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The cause of attention to the blackbird die-off was good timing. At midnight on New Year's Eve, starting the countdown to the fateful year of 2012, a town in Arkansas sees birds fall out of the sky. It sounds like the opening to a decent horror movie, in which the hero is the only one who can connect all the fateful events and sees the horrific outcome.

The cause of the actual death was much more prosaic.

The birds died from blunt force trauma. After their deaths, they were gathered up and sent to the National Wildlife Health Center in Madison, Wisconsin. Employees there found bruises on their bodies and not much else. The lab was not impressed with the timing of the event, since its researchers analyze as many as 500 mass die-offs per year. The fact that the birds showed bruises, that they were the only species that was part of the die-off, and the timing determined the death.

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Scott Wright, the chief of disease investigations explains, that firecrackers would have set the birds out at night, flying blind.

It's believed that the noise startled them-they are poor night fliers-and they were in close proximity to neighborhoods, and they flew into homes and cars. They died of impact force to their bodies.

They believe the mass death of fish in a river elsewhere in Arkansas is unrelated.

Via Physorg.

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DISCUSSION

wonderkrisp
wonderkrisp

I don't buy this explanation. Sorry...

Here are some questions for the scientists:

1. Why, if these are so common, were they not reported in many, many other places around the same time. Since, you know, other locales were bound to have fireworks after dark.

1a. And why, like someone stated in the comments, do we not see these annually around the 4th of July (in the US). Seems like it should be happening very frequently if "fireworks" are to blame....

2. What constitutes a "mass die-off"? Is it 100? 500? 5,000? I've seen figures for these birds that are close to 5,000-6,000. That seems like a high number to have 500 such events occur per year.

Ok, so I guess I only have two questions. I'm taking off the tinfoil hat now, and am legitimately interested in having these questions answered. :)