Fig 1.
Locations of the National Wildlife Refuges included in this study.
Abbreviation represents Texas Point (TX Point).
Fig 2.
Proportion of species showing advancing spring peak across years by refuge latitude.
Only non-zero slopes were included. Trend line obtained by least squares linear regression.
Table 1.
Skewness in the distribution of slopes indicating advancements or delays in spring peak across years by waterfowl species and refuge.
Fig 3.
Proportion of species showing delayed autumn peak across years by refuge latitude.
Only non-zero slopes were included. Trend line obtained by least squares linear regression.
Table 2.
Skewness in the distribution of slopes indicating advancements or delays in autumn peak across years by waterfowl species and refuge.
Fig 4.
Proportion of species showing advancing spring peak with increasing temperature by refuge latitude.
Only non-zero slopes were included. Trend line obtained by least squares linear regression.
Table 3.
Skewness in the distribution of slopes indicating advancements or delays in spring peak with increasing temperature by waterfowl species and refuge.
Fig 5.
Proportion of species showing delayed autumn peak with increasing temperature by refuge latitude.
Only non-zero slopes were included. Trend line obtained by least squares linear regression.
Table 4.
Skewness in the distribution of slopes indicating advancements or delays in autumn peak with increasing temperature by waterfowl species and refuge.