Bird ID - Audio only (1 Viewer)

I'm having real difficulties identifying this bird - I haven't seen it but I've been hearing it for years where I live.

I live in Haaltert, Belgium - in a rural environment (or at least as rural as one can get in Flanders, probably "suburban" anywhere else). About 200m behind my house there's a small brook surrounded by a humid wood and some fishing ponds. Lots of small wildlife there, including the bird whose sound I recorded here:
https://soundcloud.com/user-210852144/tieroe-geluid-onbekende-vogel

It's a bit hard to hear, and last week I managed to record it a bit more clearly (and I used some noise-suppresion to get rid of a mechanical hum)

https://soundcloud.com/user-210852144/tieroe-geluid-luider-en-gefilterd

The bird was definitely in the little wood, quite high up in the trees.

I've been listening to many Belgian bird calls but I haven't found anything that resembles it (even vaguely) - I've had suggestions of Golden Oriole (Oriolus oriolus) and European turtle dove (Streptopelia turtur) though I really don't think either fits.

The sound can IMHO best be described as a kind of "tee-rooo" sound, and it's very distinct and repeating, there's no significant variation.

So if anyone has a clue, or has an idea where I might ask?

Welcome to the forum.

It sounds like a woodpecker to me. I don't know which one tho.

I think its one of the many variants of a Carrion Crow call.

Call and behaviour is pure Golden Oriole!

Hi and welcome to Bird Forum.

I'd suggest Golden Oriole, too. The call isn't the classic song given in most audio guides, but it sounds good as does the behaviour. There are a range of calls and songs on www.xeno-canto.org.

Cheers

This morning, my wife spotted the "Tee-rooo" - turns out that Simon's right, it was a carrion crow!