American Robins in Open Forests
American robins are common birds found throughout the continent, particularly in open forests. In winter, many robins fly to wetter forests. These forests have plenty of berry-producing trees.
Robins primarily consume insects and fruit. In spring and summer, they consume a large number of land worms, insects, and even some snails. They are sometimes observed eating small fruits, including juniper berries. Robins might change their diet based on what insects and fruits are available.
Nesting Habits
Female robins select nest sites on horizontal branches hidden by thick leaves. Nests are usually built in the lower half of trees, though they may sometimes be found higher up. American robins also nest on structures such as buildings, signs, and ledges. In western areas, they build nests on the ground. In Alaska, birds find nests on cliffs and rocks.
Nest Construction
Females build nests at sunrise. They shape a cup-like structure with dead grass and twigs. Additional materials, such as paper and feathers, may also be used. The nest is reinforced with a layer of mud, making it sturdy. Finally, the interior is lined with fine dry grass. Completed nests typically measure 6–8 inches in diameter and 3–6 inches in depth.
Nesting Facts
How long does it take for robin eggs to hatch? Here are some information.
- Clutch Size: 3–5 eggs
- Number of Broods: 1–3 per season
- Egg Length: 1.1–1.2 inches (2.8–3 cm)
- Egg Width: 0.8 inches (2.1 cm)
- Incubation Period: 12–14 days
- Nestling Period: 13 days
- Egg Description: Pale blue or sky blue, unmarked.
Behavior and Movement
American robins walk in quick bursts. They take a few steps, then stop suddenly. They may hop or make small flights just above the ground. Robins often pause to tilt their heads, scanning the ground for food. They engage in disputes over worms from time to time.
During fall and winter, robins gather in large flocks and spend more time in trees. In spring, males attract females. They puff up their feathers and spread their wings. They also touch bills to show off.
Population and Conservation
American robin populations grew by 0.13% each year from 1966 to 2019. They now have an estimated global breeding population of 370 million. Scientists classify them as a species of low conservation concern. Robins primarily eat from lawns. This makes them vulnerable to pesticides. So, they can show us signs of environmental pollution.
