Native Refuge: caterpillar food-plant data for California

Files
- caterpillars-california-st2025.csv: the native moths and butterflies established
  in California that have host-plant records, and the plant genera their
  caterpillars are recorded on (2,440 species).
- caterpillar-counts-by-genus-st2025.csv: for each plant genus name in the list,
  how many of those species are recorded on it (1,438 names).

Source
Shropshire KJ & Tallamy DW (2025). Lepidoptera of North America, north of Mexico:
an annotated list containing geographic ranges and host-plant records. ZooKeys
1261: 101-113, supplementary material 1. https://doi.org/10.3897/zookeys.1261.160796

Licence
These files are derived from that database and are made available under the
Open Database License (ODbL) v1.0: https://opendatacommons.org/licenses/odbl/1-0/
Individual contents are under the Database Contents License (DbCL) v1.0.

How the counts on Native Refuge's plant cards are made
1. From the list, keep the moths and butterflies marked native and established in
   California that have host-plant records.
2. Count them by the plant genus their caterpillars are recorded on.
3. Each plant counts the species recorded on its genus, including records filed
   under that genus's other names (for example, Agropyron and Leymus records
   count for the wildryes, now Elymus). A species recorded under two of those
   names is counted once, so a card's number can be lower than the sum of the
   names' counts in the second file.
4. Where the list's own references name a particular plant under an older genus,
   those records are added for that plant.
5. A small number of insect-plant pairs found on review not to be real host
   records are left out, and six plants the list does not cover keep a count
   from Calscape.