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Table 2 Number of grit particles per stomach (mean ± SD for n > 1) of the different members of a hummingbird ensemble in a seasonal ecosystem of West Mexico

From: True grit: ingestion of small stone particles by hummingbirds in West Mexico

Season

Individual

Species

Age

Sex

Grit particles per stomach

Mean number of grit particles per species per season ± SD

Warm-dry

1

Amethyst-throated Mountaingem

Adult

Female

0

 
 

2

White-eared Hummingbird

Adult

Male

0

 
 

3

White-eared Hummingbird

Adult

Male

0

 
 

4

White-eared Hummingbird

Adult

Male

0

 
 

5

White-eared Hummingbird

Adult

Male

0

 
 

6

Rivoli’s Hummingbird

Adult

Female

0

 

Rainy

7

Mexican Violetear

Adult

Female

2

2.5 ± 3.1 (n = 4)

 

8

Mexican Violetear

Adult

Unknown

7

 
 

9

Mexican Violetear

Adult

Unknown

0

 
 

10

Mexican Violetear

Juvenile

Unknown

1

 
 

11

Amethyst-throated Mountaingem

Adult

Female

1

 
 

12

White-eared Hummingbird

Juvenile

Female

0

 
 

13

Rivoli’s Hummingbird

Adult

Male

0

 
 

14

Rivoli’s Hummingbird

Adult

Female

0

 

Cold-dry

15

Mexican Violetear

Adult

Male

0

11.3 ± 24.4 (n = 6)

 

16

Mexican Violetear

Adult

Male

61

 
 

17

Mexican Violetear

Adult

Female

2

 
 

18

Mexican Violetear

Adult

Unknown

0

 
 

19

Mexican Violetear

Juvenile

Male

0

 
 

20

Mexican Violetear

Juvenile

Unknown

5

 
 

21

Amethyst-throated Mountaingem

Adult

Male

0

 
 

22

White-eared Hummingbird

Adult

Male

0

0.2 ± 0.6 (n = 9)

 

23

White-eared Hummingbird

Adult

Male

0

 
 

24

White-eared Hummingbird

Adult

Male

0

 
 

25

White-eared Hummingbird

Adult

Male

0

 
 

26

White-eared Hummingbird

Adult

Male

0

 
 

27

White-eared Hummingbird

Adult

Male

0

 
 

28

White-eared Hummingbird

Adult

Female

2

 
 

29

White-eared Hummingbird

Juvenile

Male

0

 
 

30

White-eared Hummingbird

Juvenile

Male

0

 
 

31

Rivoli’s Hummingbird

Adult

Male

0

0.1 ± 0.3 (n = 8)

 

32

Rivoli’s Hummingbird

Adult

Male

0

 
 

33

Rivoli’s Hummingbird

Adult

Female

0

 
 

34

Rivoli’s Hummingbird

Adult

Female

0

 
 

35

Rivoli’s Hummingbird

Adult

Female

0

 
 

36

Rivoli’s Hummingbird

Adult

Female

1

 
 

37

Rivoli’s Hummingbird

Adult

Female

0

 
 

38

Rivoli’s Hummingbird

Juvenile

Male

0

 
 

39

Broad-tailed Hummingbird

Adult

Male

0

0.8 ± 1.3 (n = 9)

 

40

Broad-tailed Hummingbird

Adult

Male

0

 
 

41

Broad-tailed Hummingbird

Adult

Female

0

 
 

42

Broad-tailed Hummingbird

Adult

Female

0

 
 

43

Broad-tailed Hummingbird

Adult

Female

3

 
 

44

Broad-tailed Hummingbird

Adult

Female

0

 
 

45

Broad-tailed Hummingbird

Juvenile

Male

0

 
 

46

Broad-tailed Hummingbird

Juvenile

Female

3

 
 

47

Broad-tailed Hummingbird

Juvenile

Female

2

 
 

48

Rufous Hummingbird

Juvenile

Male

0

 
 

49

Rufous Hummingbird

Juvenile

Male

0

 
 

50

Rufous Hummingbird

Juvenile

Female

0

 
 

51

Rufous Hummingbird

Juvenile

Female

0

 
  1. Mean number of grit particles per species per season is only reported for species in which we had more than one individual of the same species presenting grit in each season