This game uses EOL TraitBank age-at-maturity and onset-of-fertility rows matched to the reviewed animal image manifest.

• Values are converted to days for play, then displayed as days, months, or years.
• Some source rows describe age at maturity; others describe onset of fertility.
• The reveal source context keeps the exact EOL predicate, source URL, citation, and measurement metadata.

Growing up is not one universal biological checkpoint, so the source row matters.