|
|
Post by mothman55 on Aug 22, 2021 8:07:42 GMT -8
|
|
|
|
Post by mothman55 on Aug 22, 2021 8:08:48 GMT -8
|
|
|
|
Post by Adam Cotton on Aug 22, 2021 8:55:29 GMT -8
That is an impressive aberration. Adam. |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Aug 22, 2021 17:54:26 GMT -8
Ok…..I’m gonna stick my neck out and share my ‘wingspan’ thoughts. My take on it is that it’s meant to be from wing tip to wing tip like the definition below. In order to be consistent and reliable, such mounted leps front wings should be at 90 degree angles to the thorax along the inner margin. I recognize that droopy mounting could make the wingspan seem larger, so a pic with the correct mounting mentioned earlier should accompany any statements regarding the wingspan. And…yes….imho, the wingspan should include the middle thorax as part of the span just like the dictionary example of an eagle’s wingspan. After all…..part of such a span should include the inner anatomical facets ( inside the thorax) allowing for flight. wing·span /ˈwiNGˌspan/ Learn to pronounce noun noun: wingspan; plural noun: wingspans; noun: wingspread; plural noun: wingspreads the maximum extent across the wings of an aircraft or of a bird or other flying animal, measured from tip to tip. "an eagle with a wingspan of 7 ft" I realize that I’m in the minority and will probably receive a barrage of comments, but a plane’s/eagle’s wingspan is not measured by the base of each wing to tip, but from wing tip to wing tip. Why should an insect’s span be any different? Just be sure the FW mounting is a consistent 90 degrees and measure from tip to tip. Yes for wingspan measurement…..FWs at 90 degree angles.  |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Aug 22, 2021 18:01:42 GMT -8
No for wingspan measurement……FWs are not at 90 degree angles. And….btw….I’m not attacking anyone’s mounting job, just making my point.  |
|
|
|
Post by Adam Cotton on Aug 23, 2021 2:16:35 GMT -8
I have no objections to the definition of "wingspan" at all or use of it as a measure of size, but scientifically it is better to use "forewing length" in order to remove any variables due to the way a butterfly is spread. I actually prefer to lift the forewings slightly higher than the 90 degrees angle illustrated by billgarthe above, which would reduce the wingspan by a small amount. Here's an example:  Adam. |
|
|
|
Post by kevinkk on Aug 23, 2021 8:02:36 GMT -8
Another interesting topic. I suppose besides personal preference, the wing angle where the specimen looks best might vary between species.
As far as measuring size- with the varying methods of spreading, forewing length is probably most accurate- but is that length in a straight
line from the body, or along the costa? That method used either way, would eliminate the differences of body size with males and females.
|
|
|
|
Post by 58chevy on Aug 23, 2021 8:12:02 GMT -8
The body width of a butterfly is pretty much the same for closely related families such as swallowtails. Body width is significant only for heavy-bodied species like birdwings (also moths). The forewing length measurement is not subject to the angle at which the wings are mounted, so it eliminates wing-angle inconsistencies. If the goal is to accurately measure the entire wingspan, including body width, the wings of the specimens that are being compared must be mounted at the same angle (90 deg. in most cases).
|
|
