It just depends on how you look at it – filigree or carnage; design or decimation; wildlife or pest. Although the alder leaf beetles (Agelastica alni) ravage their food source, the trees seem to recover well and I rather like these blue-black metallic insects. They glow like gems in early Autumn sunshine when the new adults feed communally and when the skeletonizing outcome of their appetites is most evident
Alder leaf beetle was considered extinct in Britain with almost no records of it between 1946 and 2003. In 2004 larvae and adults were found in Manchester…possible they arrived with plant imports. The beetle is now widespread in northern England…”RHS
Artistic humans have emulated this filigree work on foliage ….
The art of creating leaf skeletons has been around for centuries, as far back as the Ming Dynasty period in China. The book “The Phantom Bouquet: A Popular Treatise on the Art of Skeletonizing Leaves,” published in 1863, details several methods used to produce skeleton leaves.Tree Hugger
The above is a wonderful treatise and well worth a read or you can go straight to this method of skeletonizing foliage
A suitable topic for Wildlife Wednesday