Nobody Is Home

It is not much of a shot but there is a story there.
It looks like my tenants (Eurasian collared doves living on my garden) played a prank on me.
You see, last Friday (on the World Photography Day) I went out onto my south second floor terrace to check upon those magnolia seeds

No big change there, not worth documenting.
Then I looked a bit up and just in front of me I saw this! A nest placed on a magnolia branch, less than 2 meters from me.
Obviously nobody was home.
The family moved out, but I can observe them almost every day when the three of them sit at the balustrade of my upper balcony and the parents feed the little one (it is a bit smaller than the adults).
Now how come that I didn't spot them earlier when they occupied the nest?
How did they disguise? No idea!
Do doves laugh? They must have been laughing seeing me so near and not noticing them.

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Samsung NX10