Figure 9 in A long-term survey of spring monarch butterflies in north-central Florida

Figure 9. Egg abundance through the spring, recorded as mean eggs/stem for each week from 1994 through 2017 (50 plants per sample, minimum of 500 plants examined each year; excludes 1997, 2001, and 2004). Means are shown with 95% CI calculated from 3545 eggs found during 44,753 surveys of stems.