Figure 5. Intravaginal temperatures of Katahdin ewes in black walnut silvopasture (BSP), honey locust silvopasture (HSP), and open pasture (OP) in Blacksburg, Virginia. Ewes in silvopasture exhibited about 1.0 to 1.5ºF lower intravaginal temperatures, particularly during daytime hours, than those in OP.
Time in hours on x-axis, temperature (F) on y-axis. Lines show similar patterns for black walnut and honey locust silvopastures, which are lower than OP during the day.

(Poudel et al., 2022)