Supplementary Table 3. Forage ratio and Manly forage ratio of individual or biomass
availability for the most abundant bird species and bird and mammal species identified in blood
meals including the Least Bittern
Count
Biomass
Host
Fraction
Forage Ratio ± SE
Confidence Interval
Manly Ratio a
Host Fraction
Forage Ratio ± SE
Confidence Interval
Manly
Ratio a
Bare-faced
Ibis
8.31
0.34 ± 0.14**
(0.00, 0.70)
0.003
0.0003
38.29 ± 15.41***
(0.00, 78.35)
0.001
Cow
7.50
0.44 ± 0.16*
(0.02, 0.87)
0.003
0.9010
0.04 ± 0.01***
(0.00, 0.07)
<0.001
Great egret
6.74
<0.07 ± 0.07***
(0.00, 0.24)
0.0009
<4.90 ± 4.89
(0.00, 17.61)
Snowy egret
5.81
<0.08 ± 0.08***
(0.00, 0.28)
0.0003
<13.38 ± 13.35***
(0.00, 48.09)
Common
Moorhen b
5.53
0.09 ± 0.09** b
(0.00, 0.31)
0.0003
14.05 ± 14.08***
(0.00, 50.47)
Cattle egret
5.81
<0.10 ± 0.09**
(0.00, 0.34)
0.0003
<16.33 ± 16.29***
(0.00, 58.67)
Human
3.99
4.96 ± 0.69***
(3.18, 6.74)
0.0502
3.95 ± 0.55***
(2.53, 5.36)
Snail Kite
3.74
<0.12 ± 0.12**
(0.00, 0.44)
0.0002
<24.02 ± 23.96***
(0.00, 86.29)
Blue-Headed
Parrot
3.62
<0.13 ± 0.13**
(0.00, 0.46)
0.0001
<31.77 ± 31.70***
(0.00, 114.16)
Smoothbilled Ani
3.58
<0.13 ± 0.13**
(0.00, 0.46)
<0.0001
<82.62 ± 82.43***
(0.00, 296.85)
Limpkin
1.81
13.00 ± 1.61***
(8.64, 16.97)
0.096
0.0003
757.03 ± 93.59***
(513.79, 1000.28)
0.017
Striated
Heron
1.57
7.53 ± 1.42***
(3.86, 11.21)
0.056
<0.0001
2095.76 ± 393.66***
(1072.58, 3118.94)
0.046
Cocoi Heron
0.95
7.45 ± 1.85***
(2.63, 12.27)
0.055
0.0005
146.33 ± 36.42***
(51.67, 241.00)
0.003
Capybara
0.86
12.02 ± 2.43***
(5.71, 18.32)
0.088
0.0069
14.96 ± 3.02***
(7.11, 22.81)
<0.001
Blackcrowned
Night-Heron
0.82
20.70 ± 3.14***
(12.53, 28.87)
0.153
0.0001
1606.50 ± 243.96***
(972.42, 2240.59)
0.035
Horse b
0.49
0.97 ± 0.97
(0.00, 3.49)
0.007
0.0350
0.13 ± 0.13*
(0.00, 0.48)
<0.001
Anhinga b
0.10
4.85 ± 4.84
(0.00, 17.44)
0.036
<0.0001
247.15 ± 246.57***
(0.00, 888.03)
0.005
Pinneated
Bittern b
0.05
8.74 ± 8.72**
(0.00, 31.40)
0.064
<0.0001
655.25 ± 653.70***
(0.00, 2354.30)
0.014
Least Bittern
0.04
54.62 ± 24.14***
(0.00, 117.35)
0.402
<0.0001
39790.29 ±
17583.66***
(0.00, 85492.66)
0.877
Species
0.001
0.037
<0.001
<0.001
Forage ratios (FR) and Manly indices were calculated from point-transect data total numbers and the estimated
biomass for each species. A FR >1 indicates preference, or over usage, of a particular host when equated to
individual and biomass availability, while a FR of <1 indicates no host preference, or an under usage. Manly indices
were only calculated for species identified in blood meals
a
- >0.077 indicates a preferred host amongst vertebrates identified in blood meals. Preferred hosts in bold
b
- Less than 5 blood meals were identified for these species, thus the FR are indicative but not statistically supported
Forage ratio statistical significance is indicated, other wise it is not significant. *, P<0.05; **,P<0.01; ***,P<0.001