Sadly the site of the Clipon will maybe be inaccessible for the public soon (we have somes spots in Belgium but clearly not as good...)
You can find black and middle-spotted woodpecker near Brussels. Black woodpecker is now everywhere in Belgium (but never easy to see) and the middle-spotted is easy to see in the half south of Belgium.
Genappe is currently not accessible to public. the 3 other water treatment sites : Eghezée-Lomchamps, Tienen and Hollogne-sur-geer can be good mostly for waders if levels are good. The agricultural area between these 3 places (the best place is north of Boneffe) is good in august - early september for Dotterel (with flock sometimes of 40-50bids but more often of 5-20) and also, montagu's, hen and marsh harrier (with always possibility of the rare pallid...). Tawny pipit are also often seen along the little road in that area! Near Tienen, there is also a great place for marsh birds (great reed warbler, marsh terns) : Het Vinne.
The Dijle valley near Brussels is a great spot (better than a few year back I think) : several little lake with reed, somethimes mud,...you can see great white egret, osprey, a few waders (I saw marsh sandpiper there),...
On the coast, the best area is between Ostende, Brugge and Knokke : migrant and breeding waders, tens of thousands of gooses in winter, passerines in autumn along the coast (well it's not Fair isle ;o)), also the best spot in belgium for visible migration, the Fonteintjes between Blankenberge and Zeebrugge (
http://trektellen.nl/trektelling.asp?telpost=74&land=2&site=0&datum=20110508&taal=3) It's almost finished this year but we'd : 2 night heron, 85 purple heron, 900 spoonbill, 10 black kite, 3 red kite, 350 marsh, 26 hen and 8 montagu's harier, 10 osprey, 50 merlin, 6 crane, 12 dotterel, 6,500 knot, 11 temminck's, 12 curlew, 1 marsh sandpiper, 1500 greenshank, 130 woodsandpiper, 10 gull-billed tern, 11 caspian tern, 400 black tern, 1 whiskered tern, 20,000 swift, 35,000 hirundines, 6 red-rumped swallow, 110,000 meadow and 3 tawny pipit, 110 ring ouzel, 2 ortolan,...
an other good area is the yser (of Ijzer) valley : there is first the best place for waders in Belgium between Beveren and Stavele (near France) then the area of the Blankaart (lake, wader spot, thousands of goose in winter), then the Viconia Kleiputten in Stuivekenskerke : small pool with reed (also savi's warbler there) and a pool that is sometimes good for waders. The last spot is the river mouth (the only in Belgium) in Nieuport with good mudflat. Crested larks breeds in the dunes between Nieuport and De Panne.
For waterbird, the area west of Antwerpen is also very good, the area of Doel, Kieldrecht, Verrebroek and kallo has lots of spot for waders, marsh bird, ducks. There is now a singing male little crake! It's also the only place were spoonbill breeds in Belgium!
The south of Belgium is better for "forest" birds, butterfly and scenery : black grouse (a very small population but easy to see from a vieuwpoint in marsh-april), corn crake (very rare), black stork, black and red kite, honey buzzard, big number of crane in active migration, eagle owl, tengmalm's owl (very rare), barn owl (common), nightjar (scarce), grey-headed woodpecker (very rare but possible around the lake of Eupen), wryneck, dipper, redstart, winchat, medodious warbler (common), great grey (scarce) and red-backed (common in somes place) shrike, spotted nutcracker, raven,...And the lake of Virelles is the best spot in Belgium for osprey in autumn (up to 10!) and also good for spotted crake
FD
