BirdMark Vetting of Leg Flag Submissions

The vetting system draws on the valuable knowledge and time of Citizen Scientists to help us verify the thousands of submissions sent to BirdMark from around the world. Taking your time, please analyze the images and input your observation details as best as you can.

We thank you immensely for your participation in the Birdmark vetting program; we couldn't do it without you! If you have enquiries please send an email to

In order to contribute, please provide your email. This allows us to keep track of which images you have vetted. All details will be kept strictly confidential, and you can view our privacy policy for more information.

If you have a BirdMark account, please first login.




Please provide your best estimations for the following details. If you do not want to assess this record, feel free to skip it.


Very uncertain

Very certain

BTO Code:

Very uncertain

Very certain