Verify completeness of metadata

[ha0ye]

We have a vignette with some summaries - https://weecology.github.io/MATSS/articles/dataset-summary.html

Currently, we've extracted many of these fields from BioTime. Doing the same for the other datasets needs to be done, and can be documented here:

• BioTime
• North American Breeding Bird Survey
  • species table
  • location (there are coordinates for each sample, but now also location info in metadata)
• Global Population Dynamics Database
• Cowley lizards
• Cowley snakes
• Jornada rodents
  • species table
  • location
• Karoo ungulates
• Kruger ungulates
• Maizuru fishes
• Montana plant quadrats
• Portal rodents
• Sonoran desert
• Shortgrass Steppe rodents