grouping links to taxonomic databases

[kdarras]

We need to link to a proper taxonomic databases, such as iNaturalist or Avibase (still needs some research) to display the most relevant images instead of a google search.
All these links to other databases that enable interoperability should be collapsed under a "check" button where more references will follow and the proposed links will depend on the chosen taxon (i.e., Avibase only appears for birds, Amphibiaweb for amphibia, etc.)