BTO Ringers Info: an app to help bird ringers, nest recorders and scientists check the correct ring sizes/codes to use for each bird species ringed in the UK (for both adults and pulli). Also contains useful info on the types of rings themselves (sizes, metal type, scheme address) and bird weight and wing length, where BTO data allow. BTO Nest record data (where available) and helpful codes are now included.
v1.10: Mallard and Magpie two-letter codes fixed v1.09: 'Apostrophe' bug fix for Cetti's Warbler etc. v1.08: CBC codes added to species pages v1.07: Species with apostrophes now handled correctly (Cetti's Warbler) v1.06: Silly icon errors - fixed v1.05: Wing Point added for all species, and Eagle Owl added as new species