Differences in within-year population dynamics (IMAGE)
Caption
Observations of Pieris rapae (red area n = 10,236) and P. napi (blue area, n = 20,492) within their common Swedish geographical range over the years 2010–2021. Both species display two distinct flight peaks, but in P. rapae the relative size of the spring peak, constituted by overwintering individuals, is much smaller than in P. napi. Data from the Swedish Species Information Centre54.
Credit
Olle Lindestad
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