Leo probably painted more than his father but I know of several paintings by Petrus which I want to add to the website when I have had the opportunity to track them down.
Louis Stracké painted a number of pictures of birds and other animals, one of which I show here. There is another of a Maned Wolf, in a collection in the Netherlands, which I will add if I can be sure it is free of copyright. Unfortunately, the version I have on file is covered in watermarks.
The Dutch have been very forward-looking with copyright, the Rijksmuseum having led the way in making its collection of art available for download with no commercial restrictions.
Painting by leo Arendzen
Although Leo's preferred medium seems to have been oil on canvas, he sometimes used watercolour for narrative paintings. I recall two large religious watercolour paintings by him, on the wall of the drawing-room, at Kingston Road.
The painting shown here is photographed from a print but it seems probable that it's a watercolour.