The Project > Ask the Peregrine Chick
Keeping Track of Bands
RCF:
Thanks from me also.
Rose:
Thank you TPC that was the info I was looking for it's another little bit of knowledge to keep me young and old age at bay :) :-*
bcbird:
This is very interesting. Thank you for explaining these details, TPC.
The Peregrine Chick:
--- Quote from: Rapidcitymbfan on May 13, 2011, 21:51 ---
--- Quote from: bcbird on May 13, 2011, 21:25 ---I think Hurricane was thought to be a male by those doing the banding, but the band he/she was given was already the one he/she was going to get, regardless of sex. Is that right, TPC?
--- End quote ---
I know female legs are normally bigger, is there any information on the silver bands indicating the sex of the bird or is up to bander to register what he/she thinks the sex is?
--- End quote ---
We measure leg size to sex our birds at banding. If a bander found a silver band on a dead peregrine and couldn't tell the gender of the bird by size, then the size of the band (6 or 7A/7B) would tell them what gender the bird was banded as.
If someone submits a band or band number to the banding office, they will provide the gender as well as banding location and age of the bird.
The Peregrine Chick:
Male and female bands are different sizes and as such have a different series of numbers - there are 22 sizes of bands used in North America, they are numbered from 0 to 9 (with letters to help differentiate intermediate sizes). There are also bands for humming birds but they are like thin layers of aluminum foil and don't have a number.
Peregrines take sizes 6 and 7A/7B. The males wear size 6, females wear 7A/7B. I think all our females wear 7As, the 7Bs are probably more for use on tundrius birds, they are just that much larger in general.
Each band size has a unique prefix four digits. Currently the first four digits for our males is 816, for our females it is 1387. (note the 0 in 0816 is not impressed on the band, its implied). These numbers are not geographically distinct, rather they were the next numbers in sequence as banders restock their inventory. Radisson's chicks could also be 816/1387 as too could be birds in Nova Scotia. Canadian banders get their bands through the Cdn banding office, US banders from the US office.
Remember, each bird has a unique number, so no we won't have 7A bands (female) that start with 816 (a male 6 band prefix).
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