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Table 9 Quantitative scores for species delimitation of the two Blue Chaffinch taxa teydea (Tenerife) and polatzeki (Gran Canaria), following the scoring system of Tobias et al. [20]

From: Species-level divergences in multiple functional traits between the two endemic subspecies of Blue Chaffinches Fringilla teydea in Canary Islands

Trait type

Most divergent character teydea vs. polatzeki

Effect size (Cohen’s d)

Score

Morphology

Bill length (males)

3.43

2

Song

Frequency (MHz) change in 1st phrase

−9.08a

3

Change in max amplitude from 1st to 2nd phrase

3.58a

2

Male colouration

Colouration wing bar (PC1)

−3.65

2

Colouration back (PC1)

1.90

1

Black band on forehead (faint vs. marked)

Minor

1

 

Total score

 

11

  1. acalculated from Sangster et al. ([37]; Table 3)