What sort of information are you looking for? The few files I checked on [[Category:Files from the Biodiversity Heritage Library]] (butterflies) seem to be described in detail (mention in description + category for each species), is this what you're aiming at?
Managing the information templates seems a nightmare, perhaps you should aim at categories. HotCat works well enough per se, but you still need to know the category guidelines (or better, the precise name of the category). It would be great if the autocompletion could be fixed so that 1) you don't need to know in advance whether the category you need is e.g. "Churches of Finland" vs. "Finnish churches", 2) redirects and soft-redirects are followed, e.g. from plural to singular and viceversa. If such a feature existed, maybe even files uploaded with the UploadWizard may at some point have categories.
Nemo