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A bird of prey is a great thing to have around. They keep the rodent population down.
I think a pair are building a nest on my front lawn.
mutualism ............ No, its commensalism
behavioral
Garbage and a place to nest. Garbage and a place to nest.
Birds use both their beaks and their claws for nest building.
They start building a nest.
Yes, building a nest is a learned behavior for robins. While they have innate instincts related to nest-building, they also learn the specific skills and techniques from observing other robins or through trial and error.
They build nests yearound. Their other nest was destroyed most likely.
They build their nest in trees because a building people may scare them away.
There are various ways through which you can keep a robin from building a nest in your patio rafters. You can net the top of your patio rafter which will keep birds away.Ê
How: By building a nest. Why: To live in and raise their kids in.