Thanks for all the comments! I've also has some off-line emails about this. A couple of those have said this is not a band style used by falconers.
The most promising lead says that raptors get relocated from DIA, and are marked with bands like this. This is done by the USDA, and I will try to contact them for confirmation. Stephen Price Longmont, CO On Thursday, March 11, 2021 at 12:08:31 PM UTC-7 Stephen Price wrote: > There has been a red-tail hawk hanging around my neighborhood in Longmont > this winter. I noticed that it had a plastic band on one leg, and reported > it to the Bird Banding Laboratory. The BBL couldn't give me any info about > when or where the bird was banded because I don't have enough information > for them. The bird is either lacking a metal band, or the metal band is > placed way up high on the leg. > > The plastic band is dark brown or black with yellow numbers. It has a > yellow stripe near the top. Above the stripe it says "CO" in very small > letters. The numbers I have seen are > > (5 or 6) (blank) 585 (blank) 5 > > It might have "585" on both sides of the band, or else maybe I have only > seen the band from one side. > > I have taken numerous pictures of the band. Here are links to eBird > https://macaulaylibrary.org/asset/315676601 > https://macaulaylibrary.org/asset/315676611 > > Does anyone know who uses this type of band on hawks? > > Stephen Price > Longmont, CO > -- -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To post to this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/cobirds?hl=en?hl=en * All posts should be signed with the poster's full name and city. Include bird species and location in the subject line when appropriate * Join Colorado Field Ornithologists https://cobirds.org/CFO/Membership/ --- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/cobirds/794b3eea-1d28-4474-a00f-fc909800c89an%40googlegroups.com.
