Pigeons can tell the difference between good and bad art.

From the Daily Mail:

Pigeons can tell the difference between a beautiful piece of art and a messy scribble, according to radical new research.

The birds study the colour, pattern and texture of watercolour and pastel paintings and decide whether they are 'good' or 'bad' in the same way as an art critic.

They were able to successfully pick out the good paintings when shown a selection of work by school children.

A school art teacher and ten other adults classified pupils watercolour and pastel paintings as either 'good' or 'bad'.

Paintings were considered 'good' when the images were clear and viewers could see the specific characteristics of the subjects in the paintings.

Pigeons from a racing society were placed in a chamber where they could see a computer monitor displaying the children's art.

In the first series of experiments, four pigeons were trained to recognise 'good' paintings by being rewarded with food if they pecked at these pictures.
Pecking at 'bad' pictures was not rewarded.

They were then presented with a mixture of new and old 'good' and 'bad' paintings and the researchers noted which paintings they pecked at.

Pigeons consistently pecked at the 'good' paintings more often than at the 'bad' paintings.