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Christina — September 14, 01:45PM

Clarification on using some of the breeding bird evidence codes

How is the "M" code being used? In the breeding bird atlas, you need to observe those 7 birds in an atlas square (10 km x 10 km) square. Is there a minimum size requirement for using the M code outside of the atlas?

For the nest building code (B) it says certain wrens (e.g., Marsh Wren), woodpeckers, and certain other cavity nesters build dummy nests. Do you know which species specifically that code would apply to? It seems to imply that not all wrens and cavity nesters build dummy nests.

I need clarification on how the "T" code is different from "S7" code (for breeding bird evidence codes). Both codes seem to imply the same thing. So, if you see a bird one week in a maple tree and then come back the following week and observe it across the road in an American beech tree (both trees are maybe 30 m apart), you'd use T, but if the bird was seen in the same maple tree then it would be S7?




J — September 14, 04:19PM

Have you read this article in the help files?
https://help.ebird.org/customer/portal/articles/1006850?t=400913

Up rated: 0 Down
Christina — September 15, 07:54PM

Yes, I read that article J. It only gives the definitions, but doesn't explain how to propely use the codes. For the M code, there is no indication if the size of the study area makes a difference such as the definition used in the Breeding Bird Atlas.

It also doesn't explain exacttly which birds can have the B code used on them. It says certain wrens, woodpeckers, and certain cavity nesters build dummny nests, but doesn't define exactly which species they are referring to other than one or two examples. I'd like to see a list somewhere, so I know which species I can use that code on.

Up rated: 1 Down
J — September 15, 08:33PM

My interpretations re some of your questions:
No size mentioned for M code so no definite size required, (eBird has their own rules and does not necessarily follow other organizations' rules)
I can't find any info anywhere on what birds make dummy nests so with regards to wrens and woodpeckers I would use the B code unless I was sure it was not a dummy nest, judgement call I guess.
I agree with your interpretation of T vs S7

If you would like other opinions on this try "The Facebook eBird discussion group"

Up rated: 1 Down
Christina — September 16, 10:41AM

Thank you, J! I didn't know this group existed, so I will check it out.

Up rated: 0 Down

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