Cobwebs Or Tent Caterpillars?

[retrocop]

We have a shrub that we inherited in the garden 40 years ago when we moved here. Small green leaves and small orange berries. Haven't a clue what it's called. It needs pruning back occasionally as it grows well.
My wife pointed out to me loads of fine cobwebs ,or appear to be cobwebs, all over the shrub. She swears they are spiders and knocked them off the bush as they are slowly killing the leaves which are turning brown. She has also bought some garden bug spray.I don't want to kill spiders at all but I don't want the shrub ruined either.
Nearest I ever saw anything like this was Tent Caterpillars in Canada. Do we get those here? Any ideas or advice please.

[Zacs-Master]

I don't know the answer to your Q, retro but, plant wise, there's a fantastic free smartphone app called Plantnet. You take a picture then let the app see what you've taken (it's really simple) and then you tell it whether you were looking at the leaf / flower or bark (for a tree) and it will tell you what it is with useful links to other sites including Wikipedia.

[Buenchico]

Box tree caterpillars?
https://www.express.co.uk/news/uk/1125431/Box-tree-caterpillars-uk-garden-news-how-to-get-rid-of-box-tree-caterpillar-attack

https://www.rhs.org.uk/advice/profile?PID=760

[Buenchico]

Ermine moths?
https://www.telegraph.co.uk/news/newstopics/howaboutthat/10116139/Creepy-cobwebs-caterpillars-bring-ghostly-look-to-city-centre-park.html

[retrocop]

Thank you so much Zacs and Chris for your prompt replies. I will investigate further with the aid of your links. Last thing I want to do is kill spiders.

[retrocop]

We have established the shrub in question is a Cotoneaster and 100% positive that these are the critturs causing the brown leaves.
https://www.rhs.org.uk/advice/profile?pid=647
Thanks once again Chris and Zacs.

[Chipchopper]

Possibly some sort of moth that may be associated Cotoneaster. I've see somthing similar before.

[retrocop]

Thanks Chipchopper. Think we cracked it. See above link.
Seems it looks more alarming than it really is as the leaves will recover. So it says! :-)

[Chipchopper]

I agree!
Not as bad as gooseberry sawfly!