So, the mystery is solved...

In a very life-like pounce le chat roux is going after the birds on the next window ledge. 
I feel certain that they all escape, leaving the adventure for another day.

Rue Crémieux is a short walking street of two-story houses facing each other. 
The colors and tromp l'oeil such as seen here are abundant.

Le chat roux which I showed you last week lives on this storybook street also.  Do you think he was the model for ce chat roux qui se jette sur les oiseaux*?
(*this red cat who pounces on birds)

28, rue Crémieux
75012, Paris