Ambystoma tigrinum

This is a very brief video of a recent encounter I had with a mass A.tigrinum congregation in the middle of a factory parking lot somewhere in Illinois. There has been rain in this area of the midwest for three days straight and they've been out everywhere this whole time. After seeing a few hundred of them I was shocked to think we only saw one casualty in the road. To get to the parking lot two of us got out and move the salamanders off the road while the other drove. This video was about the center of the lot in a patch of grass that didn't extend more than a foot from the light post it was around. In just this small patch of grass we counted 33 healthy adults plus however many were hidden in numerous burrows in the grass. I would have gotten a longer video and taken more than just this one but I didn't want to ruin my new camera in the rain. Enjoy what little footage I captured

http://s160.photobucket.com/albums/t192/axolotl_jake/?action=view&current=MVI_2410.flv

Very nice Jake. It sure is a high concentration of them Ô_o
Reminds me of a time i was literally surrounded by Salamandra s. I think it´s a special feeling when you get to see big numbers of caudates.

I wish we had hundreds of tiger salamanders wandering around after rains here. Maybe I'll just have to go to Illinois to see some. Neat video.

How big were they on average? What was the biggest and what was the smallest?

caudatadude28 said:

How big were they on average? What was the biggest and what was the smallest?

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My guess is about 8 inches long, but that's purely a guess, I didn't measure any. The smallest ones were a few towns over from where I saw the mass of them and they were all about 6 inches long.

I wonder why the mass movement at this time of year?

I wonder if the shorter days, cooler temperatures, and torrential rain they've been having in the Midwest (Yay Ike!) are mimicking spring.

Nice finds. I just found a couple of Ohio Tigers yesterday myself. As for why they are moving in the fall. It is pretty well documented (at least with Eastern Tigers) that they move at night during fall rains. Not really anything to do with thinking it is Spring, but probably looking for food.

Andy

Andy Avram said:

It is pretty well documented (at least with Eastern Tigers) that they move at night during fall rains. Not really anything to do with thinking it is Spring, but probably looking for food.

Andy

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Exactly right. They were all pretty well fed from what I could tell. Every year they seem to come out, but I've never seen as many as this year. I think the fact that they were near a breeding pond and a construction site may have played a role. There were some large ones that still had gill nubs and a lot of them were in areas that recently had a lot of earth moved. I was surprised that we only saw a handful of frogs though.

The morphs leave the breeding ponds in late fall and early spring after rains. I am guessing they are this year's morphs.