Table 2. Average density (singing males and/or territorial pairs/100ha (247 acres)) estimates from previous studies (Kennedy 1994; Messmer 1990) and current studies (2001-2002) for treatments surveyed at Central Grasslands Research Extension Center, Streeter, ND.
 

Study Area


 

Grazing Treatment

Density
Previous Current
CRP (Kennedy 1994) Rotational

Season Long

Idle

254.6

356.3

228.5

188.9

241.7

241.7

Native (Messmer (1990) Twice-over Rotation

Season Long

Short Duration

Idle

482.4

340.0

341.3

259.7

203.1

297.8

267.7

250.0

Grazing Intensity Low

Moderate

High

Extreme

Idle

-

-

-

-

-

302.8

250.0

236.1

222.2

250.0