The photo was taken a few days ago in Limburg, Belgium near a pasture with some goats.
Those are likely moth eggs... moths have a tendency to attach their eggs on metal screens that you might have in your windows or doors.
Here is a video of a moth laying eggs on glass: https://www.youtube.com/watch?v=L2zf1J8CZdg
Here is a video of a moth laying eggs on a metal screen: https://www.youtube.com/watch?v=qKHReVNAMYw
Here are photos of eggs on a wire fence, believed to be moth eggs: https://www.whatsthatbug.com/2013/09/19/possibly-moth-eggs-deer-fence/
And another example of moth eggs on a metal wire: https://hardtocomebylifestyle.wordpress.com/2014/08/31/moth-eggs/