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I had a difficult time convincing a 3 year old that the strange noises
coming from the pond at Gulf Shore Camping Park really were frogs. She
insisted frogs say ribbit!
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Most of the frogs in this particular pond were green frogs and they =
called
all night long - we were camped right beside the pond.
=20
Gulf Shore Camping Park is 11 km from Pugwash.
=20
=20
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Marian Fulton
Hantsport NS=20
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-----Original Message-----
From: naturens-owner@chebucto.ns.ca =
[mailto:naturens-owner@chebucto.ns.ca]
On Behalf Of James W. Wolford
Sent: 28 July 2008 17:45
To: naturens@chebucto.ns.ca
Cc: John Gilhen; Fred Scott
Subject: Fwd: [NatureNS] Frog over-population?
=20
Steve & Randy & Chris et al.,=20
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Check out the N.S. Herpatlas home page at
=20
http://landscape.acadiau.ca//herpatlas
<http://landscape.acadiau.ca/herpatlas> =20
=20
[Nova Scotia Herpetofaunal Atlas Project ("herpatlas")] -- see links to
species names and identification tips and photos and calls etc. etc.
=20
P.S. Randy's "ribbit" fits only the Pacific Treefrog, thus is humorous =
but
out of place here. =20
=20
Steve's comments on the Northern Leopard Frog are interesting -- I have =
no
up-to-date information, but I believe the cause of the decline which =
started
or happened a decade or two ago is still unknown, and very unlikely to
involve the chytrid fungus that infects amphibians' skin all over the =
world
now, including western Canada and western states.=20
=20
Here is some quoted information from "Reptiles and Amphibians of Canada" =
by
Chris Fisher, Amanda Joynt, & Ronald J. Brooks -- 2007, Lone Pine
Publishing:
=20
"During the mid- to late 1970s, [the Northern Leopard Frog] experienced
localized extinctions that were more extreme and widespread as one went =
west
from Ontario. The reasons for the decline remain simply guesses. In =
some
areas populations have recovered, but elsewhere, especially in British
Columbia, [it] has not recovered. Although some amphibians are well =
known
to be in decline, it is alarming that one of the most conspicuous frogs =
in
Canada should also be in decline, particularly because there is no
explanation for it."=20
=20
The ground colour of N.S. Leopard Frogs is quite variable but usually a
fairly bright green, with brownish much less common -- latter colour or
grayish is more common in Pickerel Frog. =20
=20
Back on the Green vs. Bull Frogs, another species for confusion is the =
Mink
Frog, which is sometimes difficult to tell from the Green Frog -- see =
tips
in field guides or herpatlas site re colour and broken dorsolateral =
ridges
and calls like "cut,cut,cut...".
=20
I'm forwarding to John Gilhen and Fred Scott for possible comments.
=20
Cheers from Jim
=20
Begin forwarded message:
From: Randy Lauff <randy.lauff@gmail.com>
Date: July 28, 2008 5:02:19 PM ADT
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] Frog over-population?
Reply-To: naturens@chebucto.ns.ca
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Steve,
=20
The Green Frog is Rana clamitans
(http://commons.wikimedia.org/wiki/Image:Green_Frog_Rana_clamitans_2448px=
.jp
g). It is relatively common (up my way anyway) and is easily localized =
by
its banjo-like call. The Green Frog is more aquatic than the Leopard =
Frog,
which I routinely find on land.
=20
Ribbit!
=20
2008/7/28 Stephen Shaw <srshaw@dal.ca>
OK but what's a "green frog"?
I think this nomenclature started on this current thread with Jim, but =
as a
resident alien species (me not the frog), I'd not heard that name =
before.
Do
you mean the usually-named Northern Leopard Frog (Rana pipiens), aka =
meadow
or
grass frog, or is Green Frog a different species? If it is the same =
species
(R. pipiens), is Green Frog a colloquial name restricted to the =
Maritimes?
On
the appropriateness of the name if it is the same as R. pipiens, the =
base
colour (on which there are usually spots superimposed) often is not =
green
but
light brown, as someone else remarked earlier.
On the original question of overpopulation, R. pipiens has almost
disappeared in
western Canada (BC and AB) since the 70s, but seems not to be threatened =
in
central Canada; not sure about the Maritimes. The cause of western =
decline
in
this particular species seems uncertain from the little I've read. =
Maybe
also
a chytrid (spelling?) problem spread originally from clawed frog Xenopus =
to
other amphibians, or else a debilitating trematode parasite? Does =
anyone on
NNS have specialist info on the cause of decline for this species, as
opposed
to that for amphibians generally, worldwide?
Steve
=20
Randy
'gonish.
=20
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