"Age category","Grant stage","Hambleton stage","Maltby stage","Payne age"
"neonate","0-1","A","1","a few weeks"
"juvenile","2-14","B-C","2-3","c.1-14 months"
"subadult","15-25","D-E","4-5","15-26 months"
"young adult","26-35","F","6","27-36 months"
"adult","36-41","G","7",">36 months"
"old adult",">42","H-I","8",">36 months"