Well, I wasn't really surprised/shocked by the news as it isn't the first time ...
In 2008 I checked in a damaged bird in an animal shelter in Enschede and was surprised to see a really impressively sized and beautifully coloured long-horned beetle as one of their other house guests. It had been brought in after being found in a playground earlier that day. That also was Anoplophora glabripennis
As the topic came up on waarneming.nl too last week, I assembled a short list of occurrences in the Netherlands
over the past years.
Supposedly A. glabripennis
tends to arrive in wood used for packaging Chineese imports (crates, pallets etc), not withstanding international regulations on the treatment of such wood, which seem to be neglected often enough. A. chinensis
on the other hand seems to be imported mostly by way of "infected" young ornamental trees for use in our parks and gardens.
Once more than one beetle (so possibly male and female) are out in the wild I'm not at all convinced that the measures taken (kill all trees in a 100m radius, and inspect trees in a 200m radius for some years to come - or some such) are all that effective. As shown, imho, by repetitive occurrence in Boskoop/Westland. The beetles tend
to not stray away from their place of birth too much (97% less than 200m), but are also known to easily fly 1.5km if trees of their preference are not around. I'm assuming they would also stray further if mates (of their preference) are not found close to home.
In Italy, I seem to remember from reading up a few years ago, it got out of hand and the beetles are there to stay (chinensis malasiaca
I think it was?), causing serious damage to citrus orchards.
Here is some quick and dirty IDing help for the two:
For European standards in long-horned beetles these beetles are positively BIG, we may have only very few that beat it. The well known, biggish Cerambyx cerdo
is clearly smaller - both a tad shorter and not quite as wide/plump.
While I was taking photographs I had it walking on my hand and at one point tried to stop it from moving too much for a better shot by holding a hind leg between thumb and the index finger it was walking on. The beetle hissed, opened it's jaws and leaned toward the thumb to have a go at it. I didn't have to think long to decide that the jaws where going to win this, so the thumb chickened away swiftly
The beetle was a good sport about it and halted the attack too, the moment its leg was released