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Table 5 Key to attain highest accuracy in age assignment of bee-eater nestlings on a 12-day interval visit schedule

From: Developing and validating a nestling photographic aging guide for cavity-nesting birds: an example with the European Bee-eater (Merops apiaster)

Actual age class (during 1st visit)

Assigned as (during 1st visit)

Accuracy

Visit 12 days later

1

1

0.93

Confirm age estimation with 0.94 accuracy as real class is 13

4

‒

Adjust age with 0.94 accuracy as real class is 13

7

‒

4

4

0.84

Confirm age with 0.99 accuracy as real class is 16

1

‒

Adjust age with 0.99 accuracy as real class is 16

7

‒

7

7

0.68

Confirm age with 0.87 accuracy as real class is 19

1

‒

Adjust age with 0.87 accuracy as real class is 19

4

‒

10

10

0.85

Confirm age with 0.84 accuracy as real class is 22

4

‒

Adjust age with 0.84 accuracy as real class is 22

7

‒

  1. Correction on the second visit following potential misclassifications during the first visit, in accordance with most likely miss-assigned classes from Table 4
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Avian Research

ISSN: 2053-7166