Field Journal 5
April 8, 2020, around 50 degrees, cloudy with a bit of sun, light breeze. Around 4:30-6 pm. Prairie with some trees next to lake michigan.
I saw a bunch, probably 15 or so Red-winged Blackbirds. Northern Illinois is a part of their all year territory. During the winter they roost in large flocks to conserve heat during the winter. Since they do not migrate, to stay warm in the winter they roost in large flocks at night. They also feed on seeds including corn and wheat. These food sources are readily available in the winter.
As the amount of daylight gets longer and the weather gets warmer, the birds that migrated south get the signal to start migrating back north for breeding season.
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