The "Koelbroek" area is a small forested wetland near the village of Boekend. It mostly contains deciduous forest with some wetland area within, some ditches and open agricultural grounds. The forest itself is a good place for typical forest species, like Eurasian Nuthatch, Short-toed Treecreeper and Bullfinch. Woodpeckers, like Black Woodpecker and Eurasian Green Woodpecker, are often found in the area, especially at the start of the track where a bunch of dead trees stand in the water. Near the edge of the forest and where wetland is still present, small reedbeds cover the area. Species like Reed Warbler can be found here. Sometimes Water Rail can be heard too.
In the northern part of the area, a wider ditch is located in which Common Kingfisher is often present. Also Grey Wagtail can be heard and seen here. Above the forest, predatory birds can be seen soaring over, like Common Buzzard and European Honey-buzzard. Sparrowhawk can be seen near the edges of the forest, hunting for prey.
On the agricultural fields on the southern side of the forest, Grey Partridge and Common Pheasant can be found. Flocks of Stock Dove can be present in, mainly, the winter season. The end of the track leads through the northern part of the village. Some farms are excellent for local breeding birds, like Black Redstart and Little Owl.
The area is easy accessable on foot. You can park your car at the beginning of the track on the western part of the forest and walk a circular route of about 2,5 km. The first part of the track is unpaved, but mostly dry. From about half the track the road changes to tarmac.