
Photo: (c) Tom Field, some rights reserved (CC BY) · CC BY 4.0
Anser caerulescens
Diet
Roots, leaves, grasses, sedges, grains and other plant material
Habitat
Arctic tundra, marshes, estuaries, coastal lagoons, grasslands and farmland
Range
Breeds in Arctic North America and northeastern Siberia; winters farther south in North America
Clutch size
Usually 3–5 eggs; range 1–6
Incubation period
23–25 days
Size
Average 70 cm
Wingspan
Wing length 40–45 cm
Weight
1.606–3.307 kg
Snow geese are strongly migratory waterfowl occurring in white and dark blue-gray color forms. They breed in large colonies on Arctic tundra, selecting sites near marshes, ponds, rivers or coastal habitats. During migration and winter they gather in enormous flocks around wetlands, estuaries, grasslands and agricultural fields. Adults typically pair for extended periods, and family groups remain associated during portions of their seasonal movements. (Animal Diversity Web)
The species is primarily herbivorous, using a powerful bill to dig roots and underground plant parts from mud while also grazing on leaves, grasses and sedges. Migrating and wintering birds consume aquatic plants, wild rice and waste grain such as corn, oats and wheat. Females prepare shallow ground nests lined with vegetation and down, incubating the eggs while males remain nearby and guard the nesting area. (Animal Diversity Web)