what does "HY" mean? hatching year = first year?

David Couch
 

Several recent messages refer to "HY" warblers.
Is this the banding term "HY" meaning hatching year?
In other words, a first year warbler?

My guess is that several other list subscribers are ignorant of this as much as I was and perhaps still am.

David Herzstein Couch
Berkeley

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