In 1958, the rosy-faced shiner was taken rarely at the lower stations on
both streams. This species is common in smaller streams tributary to the
lower portions of the two rivers, and probably occurs in the mainstream
only as "overflow" from tributaries. Possibly, during drought,
rosy-faced shiners found suitable habitat in the mainstream of Neosho
and Marais des Cygnes rivers, but re-occupied tributary streams as their
flow increased with favorable precipitation, leaving diminishing
populations in the mainstream.
#Notropis umbratilis# (Girard)