A checklist of European butterfly larval foodplants

Butterflies are charismatic insects, and have been well studied, particularly in Europe. They are disproportionately used in generating and testing hypotheses; on everything from general evolutionary processes, such as speciation, or host association dynamics; to conservation-related studies, such as climate change or habitat loss.
Accurate lists of the larval foodplants for European butterflies are not readily available. Mistakes are propagated and information can’t be checked for accuracy. The level of evidence is unknown, and how usage varies between countries poorly understood.
The study consulted 1,119 references to produce 19,488 records of larval foodplants for European butterflies. This resulted in 5,589 larval host plant records for 464 European butterfly species, with multiple references, enabling  information to be checked. Information was unavailable for 59 species. The level of evidence for each relationship show the current state of knowledge.
Significant issue were identi..., Two strategies were deployed to obtain information on larval foodplants. Firstly books providing lists of larval foodplant usage for each country. And, secondly, publications providing primary evidence (oviposition, eggs or larvae found in the wild) for larval foodplant usage. Breeding records were included to support usage in the wild records, or where there was limited information on a particular butterfly species., , Title: A checklist of European butterfly larval foodplants
Author: Harry E. Clarke
Address: 70 Norwood Road, Effingham, Leatherhead, Surrey KT24 5NX, United Kingdom
e-mail:

Date of collection: 11 December 2023
Georgraphy: Europe
Keywords: Hostplants, habitat, conservation, Lepidoptera, Papilionoidea

INTRODUCTION
These are the files and data that was used to produce the paper \"A checklist of European butterfly larval foodplants\"
The database used in the study was PostgreSQL version 12 and later version 14
The R scripts used to load data, and to produce Figures 2 to 5 was version 4.2.2. The R scripts reqire the following packages to be installed
install.packages(\"RODBC\")
install.packages(\"odbc\")
install.packages(\"RPostgres\")
install.packages(ggplot2)
install.packages(dplyr)
install.packages(extrafont) # fonts
install.packages(stringr) # For string wrap
install.packages(patchwork) # for combining plots together

QGIS version 3.32 was used in the production of the maps.
NOTE the order ...