04/1/15

Blotched Tiger Salamanders in Oregon

This report comes from Frances in Southern Oregon.

Tiger Salamander in Southern Oregon

My two year old pond seems to have attracted these salamanders. I am in Southern Oregon, near Klamath Falls, and on the California border. I have been told they are Tiger Salamanders, but they do not have any bright coloring.

They are mottled and striped, and the largest one I have seen in my leaf trap was about 14″ long. The pond is about two and a half feet deep, so I can’t see how many there are, and if there are any of my goldfish left. Some of the fish were about 6 – 8 inches long when I last spotted them in late summer.

The salamander in the photo was on my driveway in early February of this year. I am pretty sure they are eating all the frogs we had. I am not hearing any croaking, and the two that frequented the rim of my hot tub are not around now. I am not sure if there is anything that can be done to balance things a bit, or if some of them are becoming permanent pond dwellers and not losing their gills, as I understand happens sometimes. Do you have any suggestions or ideas? Thank you. If these are some kind of hybrid, I don’t know how good they are for the environment.

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I sent this query along to a few experts and here are their responses:

Matt Ellerbeck – The Salamander Man says:

Your email/inquiry about salamanders was forwarded to me from Susan Newman at Frogs Are Green.

The salamander in the photo you sent is indeed a Tiger Salamander. They are variable in color, so if you Google searched them, it is possible that you came across images that didn’t resemble this individual salamander. Tiger Salamanders are native to Oregon so pose no environmental threat. On the contrary, salamanders are indicators of a healthy environment!

You also mentioned some concern for your frogs. Tiger Salamanders may occasionally take frogs, however, they primarily feed on insects and invertebrates. In fact, Tiger Salamander tadpoles (or larvae) prey on mosquito larvae and therefore help keep the number of these pests down! As such, I wouldn’t consider them a real threat to the frogs.

Due to the benefits they provide I hope you will accept the presence of these salamanders. If you want to learn about things you can to do help them (as they are both amphibians such efforts will also benefit frogs too) please visit the following: Save The Salamanders – How You Can Help

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I asked Matt why the frogs may have disappeared?

He replied:

Frances mentioned she didn’t hear the frogs croaking – perhaps the frogs are indeed still around but merely not singing at this time. I believe most frogs sing seasonally, or only at certain times. I have a backyard pond with frogs, and sometimes I may not see them for days on end, and suddenly they will reappear.

I have also read that cats will kill frogs, so they, or other predators (birds, snakes), may have taken them.

These are all plausible causes, however, I can’t say for certain. The reality is, any backyard pond (whether natural or human-man) that has animals in it will also attract various predators.

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Keith Gisser, Herpetologist and founder of Herps Alive! says:

Blotched Tiger Salamander. Pretty dull-colored animal normally compared to other (sub)species.

While pretty voracious eaters, rare (in my experience) for them to eat frogs or fish (although they will eat fish when in larval form) – they prefer invertebrates.

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Sara Viernum, Founder of The Wandering Herpetologist says:

Agreed! It’s a Blotched Tiger Salamander (Ambystoma mavortuim melanostictum). There is a small, known population (native) in southern Oregon near the border. Like all tiger salamander species these will eat anything that fits in their mouths including invertebrates, lizards, mice, snakes, frogs, tadpoles, small fish, and other salamanders. Since they are a native predator in your area they may initially cause a decrease in the local frog population but once they become established in your pond their numbers will most likely balance out with the frogs.

This site has some good info about the western tiger salamander group. California Herps – Salamanders

01/11/14

Winners 2013 Frogs in the Wild Photography Contest

Thank you to all the frog lovers out there, who celebrate amphibians by photographing them so we can all share your discoveries.

Announcing the Winners of the 2013 Frogs in the Wild contest:

1st Place: Sara Viernum, The Wandering Herpetologist with this Gray Treefrog (Hyla versicolor) from near Montello, Wisconsin.

1st winner - Sara Viernum, grey tree frog

2nd Place: Paul, with his “resting frog” image.

2nd winner - Paul - resting frog

3rd Place: Geoffrey Giller with his “wood frog.”

3rd winner - Geoff - wood frog

Honorable Mention: Angie Schwartz

Honorable Mention - Angie Schwartz

11/27/13

Green Friday 2013 – North America’s Frogs 2014 Calendar

On this day before Thanksgiving, I just wanted to say thank you to all the fans that help me spread the awareness. May you all have a safe, happy and healthy holiday season.

On Friday, please think Green and not Black! My latest collaboration is with The Wandering Herpetologist and photographer, Sara Viernum with this beautiful 2014 calendar, which you can pick up in the store, right here on this website. 13 beautiful frogs from across North America.

santa frog - hyla gratiosa

07/4/13

Frogs Crossing the Road in the Rain

Rio Grande Leopard Frog by Sara Viernum

Rio Grande Leopard Frog by Sara Viernum

A frog fan, Brian, emailed about the frogs in his area crossing the road when it rains, and I asked a few experts to advise him. We all agreed to share this content so you can know what to do in your own area.

Brian asks:
To reiterate our conversation, there is an ecosystem in and around the Salt Pond community in Bethany Beach DE, which subsequently is intertwined by a few roads. There is one particular stretch of about two blocks where, like clockwork, when it rains the frogs cover the street. It seems to be two species doing this; the bull frogs and little peepers. I did a rough estimation of about 125 of these frogs are being killed by car traffic every time it rains. That’s roughly 4000 per summer season. What is it about the rain that draws these frogs to the pavement?  And what practical solution can be done to lessen the slaughter?

Best regard, Brian H.

Bullfrog by Sara Viernum

Bullfrog by Sara Viernum

Two responses from the experts:

Hi Susan and Brian,
Happy for others to chirp in as well, but the frogs are not so much attracted to the pavement, but the rains signaling the fact that its time to breed!  So when this happens the frogs migrate from where they live their everyday lives to a suitable breeding site, which hopefully still exists.  I’ve seen cases where the traditional ponds have been turned into carparks or shopping malls and all the frogs turn up and say “WTF?” And inevitably die.  There is another explanation and that depends upon the size of the frogs – if they are adults then the above explanation is probably true, however if they are metamorps or juveniles then its quite likely this is a mass migration AWAY from the breeding site of newly developed froglets to find a good place to live and the only way they can avoid drying out on the hostile pavements is to travel when it rains.

OK – what can be done to save them?

People try many things, during rainy days you can get volunteers to help the frogs across the roads, you can put signs up to warn motorists and tell them to be careful, you can close the roads – all these have differing successes depending on manpower, but the best solution is to advocate for some frogs tunnels and drift fences to be installed.  Essentially you erect a barrier, which for these species would need to be carefully constructed as peepers can climb very well and bullfrogs can jump very well, and these barriers prevent the frogs from crossing the road and direct them to an underpass where they can cross the road safely (obviously the same needs to happen on the other side so that they don’t get squashed coming back).  Having said all this, both the species mentioned are fairly common species and are not under threat (although it would be good to get their ID professionally confirmed) and are not in decline – at the moment, so it would be difficult to motivate city councils or governments to take action for a fairly common species.  But its great that Brian wants to do something an it would be great if Kerry Kriger (Save the Frogs) or I can help.

All the best

Phil Bishop
Associate Professor
Chief Scientist
Amphibian Survival Alliance
asa logo

 

 

Ranid Eggs by Sara Viernum

Ranid Eggs by Sara Viernum

Brian,

Susan with Frogs Are Green forwarded your e-mail to me.  Roadways are a huge problem for herpetofauna as you’ve found out.  The frogs are mostly likely coming out on the roads during rainy nights to move to breeding grounds or in search of food.  Frogs love rainy nights and move around a lot during them.  Some possible solutions to help save the frogs are to petition the city and or your local Fish and Wildlife/Dept of Natural Resources office to install frog crossing signs and get the speed limit lowered and/or to install fencing that diverts the frogs to an under road crossing (if one is nearby).  If this is a little used road you might asked that it be closed during certain seasons like the famous snake road in the Pine Hills in Southern Illinois that is closed twice a year to allow rattlesnakes to migrate.  Another possibility is to start a citizen group that devotes time to cruising the roads on rainy nights saving the frogs.  I’ve heard of a few areas in the US where people do this.

Thanks for being concerned about the frogs.

Cheers!

Sara Viernum, The Wandering Herpetologist

Spring Peepers by Sara Viernum

Spring Peepers by Sara Viernum

01/21/13

Announcing the Winners of the 2012 Frogs Are Green Photography Contest

We are excited to announce the winners of the fourth annual 2012 FROGS ARE GREEN photo contest. We were thrilled to receive such fabulous entries, and it was difficult to pick the winners. We hope you will continue your adventures as amphibian photographers and enter next year’s photo contest!

We accepted photos in two categories: Frogs in the Wild and Backyard Frogs.


FROGS IN THE WILD

First place: Sherri Simms – “Spotted this frog and had to snap a photo, looked like he was smiling! It was taken at a pond in London, Ontario.”

Winner 2012 Frogs Are Green Photography Contest - Sherri Simms

Second place: Sara Viernum – Northern Red-legged Frog hanging out in the wetlands at Wapato Greenway in Portland, Oregon

2nd Place 2012 Frogs Are Green Photography Contest - Sara Viernum

Honorable mention: Aaron Wang, USA

3rd Place 2012 Frogs Are Green Photography Contest - Aaron Wang

BACKYARD FROGS

First place: Simply Bananas1 “Surfin’ the green wave.”

Winner 2012 Frogs Are Green Backyard Frogs Photography Contest - Simply Bananas1

Second place: Brad Merrell – “A Frog’s Perspective”

2nd Place 2012 Frogs Are Green Backyard Frogs Photography Contest - Brad Merrell

Honorable mention: Eleanor Leonne Bennett Cheshire UK

3rd Place 2012 Frogs Are Green Backyard Frogs Photography Contest - Eleanor Leonne Bennett