There are two types of leg ring used basically (there is another one that is a split ring with a tiny screw but seldom seen in parrots). Some birds have been know to have two rings one for identification the other relating to if it was DNA sexed to show if its male or female. These days they usually stick to one ring and record all details relating to that specific bird sexing, disease testing, parentage etc, insurance, vet records to that specific ring number, gathering information from all the different places though if the bird has been sold on a few times is usually a bit of a nightmare. The first is Close Rung (or closed ring) this ring is slipped over the baby birds foot at a very young age and should be the correct sizing for the specific species. The ring is as it is stated a closed ring without any break in it. Birds are close rung before they are 21 days old before the leg bones and feet bones are “set” before this stage they are still flexible and pliable enough to have the ring slipped on professionally. The information on the ring can have many different formats from a specific breeder chosen initials, a year of breeding, a specific chick logged number, or a registered aviary breeding number. If the bird is Cites listed (ie rare classification) it should have a ring on its leg that matches its paperwork and if there is no ring it should be micro-chipped – legally a cites bird that is not registered CANNOT be sold only gifted nor can it be used for breeding purposes nor used for any monetary gain such as showing etc. Right back to leg rings. The easiest ones to read and get information from are the ones with PSUK on them these are Parrot Society registered breeders birds. This ring is on for life usually unless removed by a vet for health reasons. The split ring is as it describes a ring that is incomplete and can be attached to the leg at any stage in the birds life, and removed (as well as damaged) more easily. It too can contain all of the above information as in the closed ring. PSUK rings can usually by identified by the lettering PSUK, they also have the leg ring size on them for the specific species. The usually include the year the chick was hatched and it’s own specific number relating to records for only that chick ie who its parents were etc, the next bit of information is usually either the breeders initials or their aviary breeding name initials / number. Some breeders though like to have their own specific codings / information even on the PSUK rings. Leg rings can be silver in colour or as preferred by a lot of breeders it would seem they use a year colouring so you can tell at a distance the year that bird was hatched hence its age. You can contact the Parrot Society and request if they would be so kind as to let you have contact information with the original breeder, although if a bird has been sold on multiple times the information he / she has will be limited just the information of when it was originally sold, who too etc. BUT if you find a bird it’s a great way to start to find out about finding the rightful owner of the bird to repatriate them. The colourings for the PSUK leg rings year wise are as follow:- 1990 Light Blue 1991 Green 1992 Pink 1993 Yellow 1994 Red 1995 Dark Blue 1996 Orange/Green 1997 Violet 1998 Green 1999 Light Blue 2000 Yellow 2001 Dark Blue 2002 Red 2003 Violet 2004 Orange 2005 Green 2006 Red 2007 Black 2008 Dark Blue 2009 Violet 2010 Gold 2011 Blue 2012 Red 2013 Black 2014 Lime Green 2015 Violet 2016 Orange 2017 Dark Blue 2018 Red (apparently thereafter it will be Black - 2019, Light Green - 2020, Violet - 2021 - 6 year cycle of colours) I am sure other members will tag extra information on to this topic such as imported birds if they can.