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Nesting Behaviors that Affect the Probability of Successful Reproduction (NGSS 6-8 Grade)
There are many threats that nesting songbirds face when raising young.
• Hawks and crows patrol from the sky looking for unattended and accessible chicks.
• Weasels climb trees to steal eggs and/or chicks from their nests.
• House cats prey on fledging chicks in trees and on the ground.
• A cold snap, excessive heat, heavy rain or wind can wipe out a whole nest of chicks.
Birds build nests to try and protect against threats. On answer sheet, assess the threat from each of these predators and weather factors (on right) to each of the 3 different kinds of nests (on left), using scientific reasoning.
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