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- Path: sparky!uunet!mcsun!sunic!sics.se!eua.ericsson.se!ericom!terminus.ericsson.se!!naples!ac
- From: ac@terminus.ericsson.se
- Newsgroups: rec.birds
- Subject: Re: How does a flock turn simultaneously?
- Message-ID: <695@quirm.terminus.ericsson.se>
- Date: 20 Nov 92 12:23:31 GMT
- References: <1992Nov12.193653.21163@urbana.mcd.mot.com>
- Sender: usenet@terminus.ericsson.se
- Reply-To: ac@terminus.ericsson.se
- Distribution: world
- Organization: Camtec Electronics (Ericsson), Leicester, England
- Lines: 35
- Nntp-Posting-Host: naples
-
- They all look at each other and go..................RIGHT NOW!!!!!!!!!!!!!
-
- Andy, Leics, EnglandIn article 21163@urbana.mcd.mot.com, gtillman@neptune.urbana.mcd.mot.com (Greg Tillman) writes:
-
- In article <24114@alice.att.com>, rhh@alice.att.com (r hardin) writes:
- |>
- |>
- |> And what an abundant source of errors and misapprehensions
- |> every half-truth is! Flights of starlings have a way of flying
- |> which is theirs alone and seems as governed by uniform and
- |> regular tactics as a disciplined regiment would be, obeying
- |> a single leader's voice with precision. The starlings obey
- |> the voice of instinct, and their instinct leads them to bunch
- |> into the centre of the squad, while the speed of their flight
- |> bears them constantly beyond it; so that this multitude of birds
- |> thus united by a common tendency towards the same magnetic point,
- |> unceasingly coming and going, circulating and crisscrossing in
- |> all directions [. . . .]
- |>
- |> Songs of Maldoror, trans. Lykiard, p141
-
- A somewhat mundane followup. Sometime (over a year ago) I read
- an article in Science News about somebody somewhere (mathematician
- or biologist, somewhere on the east coast, apologies for not
- remembering more) who mimicked the behaviour of bird flocks with
- dots on a computer screen, by giving each dot a fairly simple
- set of rules (like the ones so poetically described above). As I recall,
- the scientist, at least in this article, was mimicking birds coming
- in to roost, and the rules included things like: starlings
- are attracted to each other, starlings are attracted to the roost.
- Adding a null spot or negative attraction right above the roost resulted,
- according to the article, in these dots flowing around the computer
- screen in patterns very similar to those of a wheeling flock coming
- in to roost. This is obviously not proof that starlings are programmed
- like these dots, but I found it fairly interesting.
-