 |
 |
The use of color markers, transmitters and other auxiliary markers is not authorized unless specifically noted on the banding permit, or, in the U.S., a supplementary "Letter of Authorization" (form BLL-23.3). These markers can affect survival and encounter rates and some markers are discouraged. Spiral and wrap-around plastic bands can shrink with time and should be uncoiled and recoiled in reverse, as well as sealed with acetone. Radio transmitters should not exceed 3% of total body weight. Wing tags are discouraged on hole-nesting species; neck collars and nasal saddles have potential icing problems.
Before requesting auxiliary authorization, consideration should be given to the following questions:
Receiving an Auxiliary Marking Authorization includes an obligation to the public. The chances are high that someone will see marked birds and report them to one or both Bird Banding Offices. We will forward such reports to the bander for a response, informing the person reporting the sighting about the bird(s) and the project. This applies whether or not the project solicits input from the public.
Banders are reminded that Picric Acid, commonly used to dye plumage, may become an explosive hazard if improperly stored. Picric acid should be maintained in solution and not allowed to dry out. When crystallized Picric Acid becomes a shock sensitive or impact sensitive explosive. Banders using Picric Acid should read and be familiar with the Material Safety Data Sheet provided by the chemical supplier.
How to Request Auxiliary Marking Permission The Responsibility of the Bander in Marking Birds
