The small stretch of the river Jalón we have here is a good place for bird watching all year. The construction of the treatment plant Medinaceli has made the water quality of the river has improved in this area and can observe cleanest waters. Grey heron, Mallards, Meadow pipit, Zitting cisticola, some Western marsh harrier, Water rail, Common moorthen, Cetti's warbler…
As you begin reaching the spring it will be seen here Yellow wagtail, Bluethroat -in Step-, Sedge warbler, Common stonechat, Great reed warbler, European reed warbler, Grasshop per warbler, Montagu's harrier, Common kingfisher -in step- Tawny Pipit, etc. In the salt also they appear Little ringed plover. A pair of couples at the least you can see every year there.
Outside of these wetlands, the quantity and quality of birds that can be observed here decreases much out of the spring period. The winter takes its toll and these slopes only the toughest survive: Dartford warblers, Rock bunting, Rock sparrow, sides of Red-legged partridge, Thekla lark... and the skies Common kestrel, vultures and Golden eagles. This valley is one of the best places to observe golden eagles as almost always be seen campeando a copy of nearby towns. The situation changes a lot in spring.
May and June are two spectacular months. In the valley, the creek with reed beds is filled with Yellow wagtails, European reed warblers, Nightingales and Common stonechat. It will not be hard to see European bee-eaters and Hoopoes. The poplar forest developed in Arbujuelo host populations Eurasian wryneck, Golden orioles, Chaffinches, Blackcaps and Garden warbler, Robins…
With everything, perhaps most interesting is a good visual and attention to the ear tour of the slopes. The Ortolan bunting It is shown here with good densities. Around it, depending on the degree of coverage scrub, Melodious Warblers, Western orphean warbler, Spectacled warbler and Subalpine warbler– in addition to abundant resident Dartford warbler– and maybe, by years, warbler and Sardinian warbler. Also a couple of increasingly threatened European turtle dove.
According ascend the slope is not difficult to observe in rock accumulations shed from the wilderness to the Rufous-tailed rock thrush, accompanied by Rock sparrow, Northern wheatear and Black-eared wheatear, linnets and Hoopoes. The Blue rock thrush also it appears here. Two sisters of Arbujuelo is almost certainly a point to watch as colorful species. If we made the main route and we will be in the upper moor. Depending on the time you arrive we will see Eurasian skylark, Tawny pipit, Greater short-toed lark and maybe some singing of the Dupont's lark.