[tn-dragonflies] Re: some numbers
- From: Rconnorsphoto@xxxxxxx
- To: tn-dragonflies@xxxxxxxxxxxxx
- Date: Mon, 11 Mar 2013 15:54:37 -0400 (EDT)
Yes, I agree! I spent a few hours there on two occasions, and found fewer
species than expected - lots of common pond species around the big pond of
Reelfoot - but they should be there. I found a little more variety of
habitat and species on the Obion side of Reelfoot, on my visits.
RHC
In a message dated 3/11/2013 2:47:09 P.M. Central Daylight Time,
kjchilds@xxxxxxxxx writes:
It's hard to believe that Lake Co has only 14 records. That area must be
rich in odes but not in ode-ers.
Ken Childs
Henderson, TN
Chester County
_http://tinyurl.com/FinishFlagFarmsMoths_
(http://tinyurl.com/FinishFlagFarmsMoths)
_http://www.finishflagfarms.com_ (http://www.finishflagfarms.com/)
____________________________________
From: "Rconnorsphoto@xxxxxxx" <Rconnorsphoto@xxxxxxx>
To: tn-dragonflies@xxxxxxxxxxxxx
Sent: Monday, March 11, 2013 2:37 PM
Subject: [tn-dragonflies] some numbers
Checking the Odonata Central database back in January I looked at the
numbers, and it looks like we have been busy documenting dragonflies and
damselflies TN counties over the past year.
For the 95 TN counties the average as of January is at aprox. 34.5 species
per county, up from aprox 30 spp per county last time I checked. Now there’
s only “21 under 21”, 21 counties with less than 21 species, but there
are still 6 “basement” counties with 10 or less.
This is not up to the butterfly records, but I think we Ode-watchers are
fewer and have not been at it as long as the Butterfliers. We should be able
to reach a county average for Odes of 50+, as is currently the case for
Leps, but it will take a while. The curve flattens out once the threshold
number of species, probably about 30 for odes as well as for butterflies, and
it takes more time per species to add to the list.
Some counties are harder to access, smaller and/or farther from population
centers, thus being the least surveyed. NW TN, for example, is as
under-surveyed for odes as it is for leps. But the "low hanging fruit" should
be
there for anyone with the time to target it.
Our top county continues to be Blount at 86, and with just 14 more needed,
it is within striking distance of 100 spp. It would be nice to see one TN
county reach the century mark soon. Other counties with less than 30 needed
to reach 100 would be Sullivan, Cumberland and Davidson.
A checklist for the 156 species of TN odes is still available at the TN
State Parks website, as well as checklists for 30+ State Parks/counties that
Dr David Hill and I put together :
http://www.tn.gov/environment/parks/atbi/checklists/
If interested, see 2 lists attached in Word arranged from least to most
documented, & by counties in alphabetical order.This list is also posted at
my Pbase website: http://www.pbase.com/rconnorsnaturephoto/image/121501748
(here we reach the limit of my tech abilities & computer skills…)
Odonata Central continues to be the best resource and clearing house for
odonate records and I encourage you to continue documenting and submitting
records.
Enjoy the 2013 season!
Richard Connors
Nashville
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