Dr Bill, how does one differentiate between the bullhead minnow (p. vigilax) and the fathead minnow (p. promelas)?
There is variety that Pimephales that inhabit tributaries of Rowlett creek here in the north dallas metro. They seemed to have spawned in a drainage ditch near my house. I happened to see one dead specimen that was 4" long but I see no adults where there are currently thousands of little Pimephales. All of the larger minnows are gambusia and red shiner and so it seems that the either the small Pimephales washed down from a pond that lies upstream or maybe they ran up stream after hatching? Not sure.
Anyways, both species are native in Texas and their ranges overlap where I live. We are outside the range of the bluntnose minnow which southern extent is about 60 miles north in the red river drainage (we are in the Trinity River drainage). Any help with id is greatly appreciated.
