Hi Dave,

People do perceive colors differently due to both biological capacity and
training.  This is an area of active research.

Regarding biological capacity, most people have three types of color
receptors in their eyes, each of which is most sensitive to a single color:
red, green, or blue.  Some people, mostly male, are completely or partially
color blind, meaning that one or more types of color receptor are partially
or completely disabled color receptors, resulting in diminished capacity to
discriminate differences in color.

Recently it was discovered that some females have four types of color
receptors in their eyes, giving them the potential to distinguish more
colors than is usual in humans.  This article in Discover magazine, Humans
with Super Human Vision

If you are interested in testing your ability to discriminate colors, try
out this Color Test <http://www.xrite.com/online-color-test-challenge>.  If
you'd like to see if you are color blind, check out Free Colorblindness Test
<http://www.colour-blindness.com/colour-blindness-tests/>.  Note that these
online tests are not 100% reliable, due to variation in computer monitors.

By the way, this discussion is pretty far afield from the usual content of
CAYUGABIRDS-L, and I'm surprised no one has complained yet.  People who
would enjoy participating in a similar email list with broader scope may be
interested in NATURAL-HISTORY-L.  Instructions for joining a Cornell email
list can be found in Join an E-list


On Sun, Jun 29, 2014 at 10:45 AM, Dave Nutter <nutter.d...@me.com> wrote:

> That's a great website for a neat project, Mike! On the discussion board,
> a participant (whose name & email I have omitted here) asked Linda's
> question, and the project leader replied:
> In my June 1, 2014 report I reported an individual flying with three
> flashes and reported it as orange because red was not an option. It looked
> RED to me. Is that possible?
> .:Don Salvatore - 6/16/2014 1:20 pm Firefly colors are listed as yellow,
> yellow green, green, orange, amber and blue. I have never heard of a red
> firefly. But that doesn't mean that there isn't one. Or that because of the
> way people may see colors differently or environmental conditions, you
> won't see a red firefly.
> * * *
> I still have only seen what I'd describe as yellow-green fireflies, but a
> lot of them. Maybe that's all there are at my house, or maybe I haven't
> learned to discern the colors. I certainly haven't put in the disciplined
> time of a Firefly Watch participant, but I'm considering it. Then maybe
> I'll have more legitimate replies when people ask about red flashes in the
> night.
> --Dave Nutter
> On Jun 29, 2014, at 12:24 AM, Mike Pitzrick <mpitzr...@gmail.com> wrote:
> The Museum of Science in Boston has published some web pages with
> information about how to identify fireflies using their flash color and
> pattern.
> Types Of Fireflies
> <https://legacy.mos.org/fireflywatch/types_of_fireflies>
> Flash Chart <https://legacy.mos.org/fireflywatch/flash_chart>
> Virtual Habitat <https://legacy.mos.org/fireflywatch/virtual_habitat>
> (interactive tool to help you learn to identify firefly flashes)
> These web pages are part of a citizen science project called Firefly Watch
> <https://legacy.mos.org/fireflywatch/>, which is designed to find out
> more about the distribution of the various firefly species.
> -Mike
> On Sat, Jun 28, 2014 at 10:49 PM, Linda Orkin <wingmagi...@gmail.com>
> wrote:
>> Does anyone else notice that some of the flashes look like different
>> colors. Reds and greens. Is this just like a Doppler shift type thing or
>> are they really like that?
>> Linda
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