[TN-Butterflies] Re: Phaon Crescent and fogfruit verbena

  • From: Allan Trently <ajtcorax@xxxxxxxxxxx>
  • To: Bart Jones <bjones7777@xxxxxxxxxxx>, Mike Bierly <mlbierly@xxxxxxxxxxxxx>, Tennessee Butterflies <tn-butterflies@xxxxxxxxxxxxx>
  • Date: Mon, 13 Jul 2009 09:27:00 -0400

I only have a few days experience with this species. After Bart Jones allerted 
me to their occurrance and what to look for, I went looking and found some. I 
started looking at every crescent instead of just calling everything a pearl 
even when I wasn't in the proper habitat. The ones I found in Haywood County 
were along an open (no trees or shrubs) wetland edge with dense patches of 
fogfruit. I noticed that these crescents had the "contrasting cream median 
band" as noted in Kaufman's butterfly guide. But you also need to see the 
underwing which is a different color pattern from pearl and all the other 
crescents. The ones at Haywood Co. would never land with their wings closed so 
I was not able to photograph them underneath but I did make a note of the 
color. The one I photographed in Tipton Co. only landed with its wings closed 
so I got a good photo of the underwing and took notes on the upperwing surface. 
I saw what I believe is a phaon crescent in Hardin County. It had an obvious 
contrasting cream median band on the upperside of the forewing but I never 
could get a good look at the underside. There was some fogfruit in the area. 
Unfortunately, the identification could not be confirmed. So it is important to 
see the upper and lower sides of this species. The attached photo is from 
Hardin County. Is it a Phaon? 

Allan Trently ajtcorax@xxxxxxxxxxx

Jackson, Madison County, TN


 


From: bjones7777@xxxxxxxxxxx
To: mlbierly@xxxxxxxxxxxxx; tn-butterflies@xxxxxxxxxxxxx
Subject: [TN-Butterflies] Re: Phaon Crescent and fogfruit verbena
Date: Sun, 12 Jul 2009 22:53:31 -0500



Hi everyone,
I like how Michael thinks, looking for those 'flys just outside our state but 
tantalizingly close.  That's kind of how I was thinking when I found the Phaon 
Crescents in Shelby County 4 years ago.  When I first got back into 
butterflying 5 years ago I kind of made a list of those closeby species and 
studied up on where they might be based on location and habitat.  I thought the 
Phaon might be in Tennessee and Shelby County was a good place to look.  I knew 
there were some places with large stands of fogfruit, so I went at the end of 
the summer, and lo and behold, they were there; lots of them!  That's my one 
and only state record, so of course it holds a special place in my heart.  So 
what have I learned in the past several years of observing them?  For starters, 
it seems that you need large colonies of fogfruit.  A few plants scattered 
around a lake or wet area doesn't seem to be enough.  At Eagle Lake Wildlife 
Management Area where I first found them, there is a damp field that is cut 
periodically (right now they are cutting it too frequently) that is probably 2+ 
acres in size.  Of that area, I would estimate around 20% is covered in 
fogfruit; same with the area around the headwaters of Piersol Lake in 
Meeman-Shelby Forest State Park.  I also think they have only recently moved 
into Shelby County and Tennessee, because Shelby County had been covered fairly 
well before I started butterflying and it wasn't recorded.  I found them the 
next year in Lauderdale County, then last year Allan Trently found them in 
Tipton and Haywood.  They seem to appear by the end of June/beginning of July 
and increase in numbers throughout the rest of the summer and fall.  I think 
the peak numbers hit around the end of September.  I've seen them on every 
Meeman-Shelby Forest count until this year when I didn't see any.  I went out 
today and still didn't see any, but we are having a very poor year for Pearl 
Crescents, so they may be down as well or just lagging behind.  That's kind of 
what happened last year, although I did get a few on the count, they really 
didn't bust out until the end of July.  I wouldn't be surprised if they are 
found in the counties in the western half of West Tennessee, but I would be 
really surprised to find them further east, but one never counts anything out.  
My feeling is they are moving north and east, so if you don't find them now, 
maybe in a few years you will with global warming and all.  Remember, most of 
the fun is in the looking!  So look!
 
Bart Jones
Memphis, Shelby County
 
Note the photo of the Phaon Underside shows the fogfruit flower.  Also, I've 
attached a photo with a Pearl and a Phaon Crescent for comparison.
 
 

 


From: mlbierly@xxxxxxxxxxxxx
To: tn-butterflies@xxxxxxxxxxxxx
Subject: [TN-Butterflies] Re: Phaon Crescent and fogfruit verbena
Date: Sun, 12 Jul 2009 20:23:43 -0500


Since I finally got a Pearl Crescent for the year, I thought I would look into 
the other crescent in Tennessee, the rare (at least in Tennessee) Phaon 
Crescent. The Phaon Crescent is known in Tennessee from only four counties, all 
in West Tennessee--Haywood, Lauderdale, Shelby, and Tipton. This makes some 
sense as the species is in the mid plains though on the western side of 
Arkansas and Missouri, the two states that border Tennessee on the west. 
Because of occurrences on the western side of the two adjoining states, records 
further east in Tennessee might be range limited. However, there is a group of 
records in Alabama and scattered in Mississippi so Tennessee should be in the 
mix, at least at times. The key here, as in most cases, is the host plants, 
fogfruit verbena; Lance Leaf Fogfruit, Phyla lanceolata, and mat grass, Lippia 
nodiflora. These species may not be familiar to all, at least not to me. From 
the map below, you can see that Lance Leaf Fogfruit occurs in 43 counties in 
Tennessee though how common is unknown to me, but because of its occurrence the 
Phaon Crescent could be present. According to BAMONA, the adults nectar from 
flowers of Lippia and composites including shepherd's needle. So it seems to me 
that this species should folds its wings in other Tennessee counties and now 
may be the time. No record for this year yet, but  Bart Jones had one in Shelby 
County in 2008 on July 6. Maybe Bart and any others who have had the species in 
the state or elsewhere can share some insight as to where they saw it, pointers 
for identification, and timing. 
Michael Lee Bierly, Nashville, Davidson County, TN


Tennessee Counties For Pearl Crescent

Lance Leaf Fogfruit (Phyla lanceolata)

 
Phaon Crescent (Phyciodes phaon)

 
 
 
Images of the plant, Lance Leaf Fogfruit, 
http://www.cas.vanderbilt.edu/bioimages/species/phla3.htm.


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