cup shaped birds nest |
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| navigate by keyword : cup shaped nest birds smoothly hemispherical inside deep depression house eggs pliable materials including grasses though small number mud saliva passerines non hummingbirds swifts build type |
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| The cup nest is smoothly hemispherical inside, with a deep depression to house the eggs. Most are made of pliable materials including grasses though a small number are made of mud or saliva. Many passerines and a few non-passerines, including some hummingbirds and some swifts, build this type of nest. |
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