Figure 2 | Scientific Reports

Figure 2

From: Differences in phenology, daily timing of activity, and associations of temperature utilization with survival in three threatened butterflies

Figure 2

Seasonal variation in realized thermal niches to available ambient temperatures for three butterfly species. (A) Ambient temperatures when butterflies were active/caught (shown in red) and temperature recordings when no butterflies were found (open black circles). The fitted spline curves denote occupied temperatures (red) and all available temperatures (black). (B) Comparisons of reaction norms linking activity (probability of presence) to available ambient temperature in the beginning, middle, and end of the activity period for each species (see methods). The interaction is statistically significant for Marsh Fritillary (Euphydryas. aurinia) and Apollo (Parnassius apollo). (C) Distribution of the averaged daily difference between used and available temperatures for each species. Significance levels from one-sample t-test. *** denotes p < 0.0001.

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