Free images results:
 

Nest pictures, stock photos and images

 
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Birdy Royalty Free Stock Photo
Author: Gurilla
Tree Royalty Free Stock Photos
Author: Red2000
Park Stock Image
Author: 1a
Doves Stock Photography
Author: Lilalila
Shells Stock Photography
Author: Mika5
Parrot Stock Photos
Author: Gurilla
Swan Stock Photos
Author: Catcha
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Nest eggs Royalty Free Stock Photos
Author: Kenliu
Nest egg Stock Photo
Author: Zimmytws