Electronic Supplementary Material 5. (A) Relationship between individual mimicry
diversity and the number of strophe recorded. The logarithmic trendline is also shown.
Data from the two species were clumped as similar trends were found when analyzed
separately.
1
Electronic Supplementary Material 5 (B). Relationships between mimicry performance and descriptors of song complexity and continuity. GLMs
were used, and only those models separated by less than 4 AIC points from the model with the lowest AIC are shown. ·P<0.1, *P<0.5, **P<0.01,
***P<0.001
Model
Crested lark
Mimicry diversity Overall song complexity+ Strophe duration+
Inter-strophe duration+ CV minimum
frequency+ Number of strophes recorded
Mimicry prevalence Overall song complexity+ Strophe duration+
Inter-strophe duration+ Number of strophes
recorded
Thekla lark
Mimicry diversity Overall song complexity+ Number of strophes
recorded
Mimicry prevalence Overall song complexity+ Strophe duration+
Number of strophes recorded
Z-values
AIC
Explained
deviance (%)
(5.5)***+(4.7)***+
(-4.0)***+(1.7)·
+(5.2)***
273.17
49.5
(5.9)***+(3.5)***
+(-5.8)***
-18.9
55.2
(5.4)***+(5.3)***
289.1
62
-8.6
40
(3.9)***+
(-3.0)***+(2.4)*
2
Electronic Supplementary Material 5 (C). Proportion of lark individuals imitating model
species and proportion of individuals imitating a model when it occurred in the same transect.
Proportion of lark
individuals imitating
the model
Model species
Congener
Lesser-short toed lark
Short-toed lark
Calandra lark
Skylark
Dupont's lark
Woodlark
Tawny pipit
Grey Wagtail
White wagtail
Swallow
Southern Grey Shrike
Great tit
Spectacled Warbler
Dartford Warbler
Cetti's Warbler
Blackbird
Song thrush
Stonechat
Nightingale
Wheatear
Spotless starling
House sparrow
Goldfinch
Serin
Linnet
Chaffinch
Corn bunting
Greenfinch
Golden oriole
Jay
Stone Curlew
Red-legged partridge
Bee-eater
Swift
Buzzard
Kestrel
Crested
lark
59
64
33
54
49
13
5
23
3
3
5
15
3
5
10
0
5
8
10
5
18
23
23
15
5
41
13
5
3
5
0
31
15
5
21
3
36
Thekla
lark
67
79
21
49
58
9
2
16
2
5
19
19
7
21
37
2
12
2
14
2
28
19
23
2
2
53
7
0
9
0
2
40
33
12
28
0
53
Proportion of lark
individuals imitating a
model when it occurred
in the same transect*
Crested
lark
45
63
92
90
20
60
2
67
2
0
100
0
2
100
0
2
0
0
0
2
57
22
33
2
0
31
0
50
0
0
0
36
50
100
50
0
0
Thekla
lark
76
65
78
52
16
50
0
71
0
2
50
13
0
22
31
0
40
2
50
0
83
25
10
0
2
50
0
0
0
0
0
24
29
60
58
0
0
3
Quail
Little owl
Great spotted cuckoo
Green woodpecker
5
5
3
5
12
5
0
2
50
0
0
0
0
0
0
0
* Zero-values represent cases in which the mimicked species was not found in the same
transects as the recorded birds.
4
Electronic Supplementary Material 5 (D). Relationship between the frequency of
imitations of a model species (n. of individuals imitating a model/ number of overall
individuals recorded) and the level of complexity of its vocalizations. Mean frequencies
± standard errors are shown.
5