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Predicting the distribution of poorly-documented species, Northern black widow (Latrodectus variolus) and Black purse-web spider (Sphodros niger), using museum specimens and citizen science data

Fig 1

Suitable climatic habitat of Latrodectus variolus predicted from 1990–2016 observation records.

Observation records are shown for both 1960–1989 and 1990–2016.

Fig 1