Walt, I have heard of people using two Telinga dishes put together with a
suitable fibre in between. It's said to be very effective in situations like
below, to keep noise away.
Klas.
At 10:47 2002-08-04 -0400, you wrote:
>On my trip to south Georgia this last week I managed to record a bit of
>the Greenhouse Frog, a tropical species that's moved into the state. It
>was the reason for the trip. They arrive in potted plants coming up from
>Florida, where they are already established. They are unique in that
>they have no tadpole stage, but lay eggs in damp places that develop
>directly into frogs. Here in Georgia there are only three known
>locations, all in the middle of residential areas. The site I used was
>on St. Simons Island at the home of a DNR employee.
>
>They will call if it rains, so we ran a sprinkler. Their call is so soft
>that most calls you can't hear if they are at your feet. And I was
>having to deal with the various house air conditioners in the
>neighborhood. The frogs were in the leaf litter under some thick low
>bushes in the yard. I ended up recording with the Telinga from a
>distance of about 2', the tops of the bushes, probably something of a
>record for close mic work with a parabolic. The reflector helped to cut
>down the noise from the air conditioners. It's still going to take a lot
>of filtering.
>
>The other unique thing about these frogs is that their calls are not
>confined to a single frequency pattern like other Georgia frogs. Though
>each call is fairly narrow in frequency, they cover a couple thousand
>cycles in variations call to call with no apparent pattern in doing so.
>
>I also photographed these frogs and there's new photos up on my site.
>The entire site had to be reorganized due to a change in how my ISP
>allots space. I just got that done last night, if anyone runs into any
>bad links, etc. please let me know:
>http://wwknapp.home.mindspring.com/GAFrog.Toad.html
>
>With that I'm down to one Georgia frog I've not recorded, Brimley's
>Chorus Frog. They won't be calling until February or so, and are very
>rare in Georgia, I've been trying for them for a couple years already.
>
>Walt
>
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