I had an experience this week on a stream down here in Maryland that I had to share considering this recent post on madtoms and stonecats. I was fishing my favorite WW stream that I've caught some nice smallies (and largemouth) from.
Smallie#1
Smallie#2
Smallie#3
After working my way upstream throughout the day, I started walking down stream. I approached one hole or area of slack water where I regularly see(and sometimes catch) some nice smallmouth. The attached picture shows this stretch, looking upstream.
WW stream image
I hopped down from the big rock upstream on the left with the blue arrow and was promptly greeted by a northern water snake in the shallows (circled green), who had recently gotten a meal. As I approached, he began to work down stream away from me (and right onto the small, narrow and only path downstream, where the orange diamond is).
At first, I thought he had some type of rodent. But the longer and better look I got, I couldn't figure out what he had. It appeared almost 3-4 inches in length, dark brown/almost black, and very shiny/slimy. I then thought maybe it was newt or salamander of some type.
Northern water snake with his meal
I gave him some time and distance in hopes he would clear the path and I could continue down stream. Of course, he just posted up inches from the path and began working on his meal. I continued to get closer to try and make my way past while figuring out what he had captured. My last thought as I waded out into the stream in order to avoid him was that it was a small catfish, as I thought I saw gills on the creature in the snake jaws that were flaring as the snake chomped and bit down. I knew not of madtoms or stonecats and figured this wasn't at all likely for a small catfish to be in this stream or section, especially since I'd never seen one with all times I've fished here.
I then log on here the next day and see the post on the blog about these little catfish, that inhabit shallow,riffle areas of streams and are a favorite of smallmouth. It all made sense. With the research I've done since and learning that the big smallies and madtoms/stonecats being of no coincidence, I've since ordered some madtom lures(because I still do some spin tackle fishing for big bass) and flies in hopes of hooking into the big smallies I've seen but not yet caught.