Obscure Grasshopper

Opeia obscura (Thomas)

Table 1. Population fluctuations of grasshoppers in a mixedgrass prairie site of eastern Wyoming (Platte County T28N R 66W Sec 34 NE).

Number per sq yd and (increase rate)

1968

1969

1970

1971

1972

1973

1974

Ageneotettix deorum

3.4

2.2
(0.6)

0.8
(0.4)

1.2
(1.4)

0.8
(0.7)

1.3
(1.6)

3.3
(2.6)

Opeia obscura

1.9

0.6
(0.3)

0.1
(0.2)

0.1
(1)

0.1
(1)

0.2
(2)

0.9
(4.5)

Assemblage of 19 species

12.8

6.1
(0.5)

2.9
(0.5)

5.6
(1.9)

4.0
(0.7)

3.3
(0.8)

10.5
(3.1)

Back to the Fact Sheet

List of Species Fact Sheets

Field Guide Contents