Plains Minnow - Hybognathus placitus
The plains minnow is similar to the western silvery minnow in many features. It is native, silvery in color, found in the same major drainages and even at the same sites as the western silvery minnow, eats similar foods and attains about the same size. The plains minnow is so similar to the western silvery minnow that the two can only be told apart after making a dissection and examining a certain bone in the head.
Overall, the plains minnow is very silvery; the back is dusky or yellowish-olive, and the underside is white. The plains minnow has 15 to 22 scales across the belly from lateral line to lateral line.
Western Hemisphere Range
Summary of Observations Submitted for Montana
Number of Observations: 539
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(Observations spanning multiple months or years are excluded from time charts)
Habitat for the plains minnow is probably similar to that for the western silvery minnow. Seventy percent of specimens in a southeast Montana study were taken in the mouths of streams, showing their preference for larger streams.
Food habits are probably very similar to the western silvery minnow.
The ecology of the plains minnow is very similar to H. argyritis. They are distinguishable by the pharyngeal process of the basioccipital.
Reproductive biology is probably very similar to the western silvery minnow.
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