Dozens of blue UFOs caught over Tavira, PT

On July 30, 2016, an inhabitant of Tavira (city located on the south coast of Portugal) has taken photos of several dozens of blue spherical-shaped UFO in the night sky. What is it?

Witness statement:

30 of july 2016 in Tavira in Portugal
We Saw A sworm of blinking lights in the air over the House in north.
IT is very diffucult to tell what distanse from us, but pretty far from the roof.

They changed positions in the group while standing There. I took some pictures.
After some minutes They moved to south side og the House and stood there
Some more minutes befor they moved up to the sky.

They were far to big to be insects.