This time I will not say where I've been, because I am going to show you 2 species in danger of extinction, but I think that will be many people with the tracks that I going to give you, who will recognize the place.
If someone want to visit it, I'll be happy to do so.
They are foraminifera, http://en.wikipedia.org/wiki/Foraminifera a kind of macroplacton, swimming in the waters of the prehistoric sea that disappeared when the Iberian peninsula was built against the European continent.
Among its concentric circles, sprouted a number of something similar to a little hairs with which they fed.
The main of the limestone of the Pamplona/Iruña basin, looking to the south, are made with skeletons of trillions of these beings (Alaitz and Sarbil ranges, pilatos balcony, above Urederra fountainhead, ..)
I have found this very good link about these things:(in spanish)
The second clue corresponds to the river that flow in this area. Its waters have been carving in the rock several circular holes called potholes. Sometimes, a stone is trapped by the current in an imperfection of the rock, as a small hole, and with the water movement this stone begin Smoothing and getting bigger the hole until it can reach several meters in diameter.
|Pothole with the dead trout|
I put my hand to hand as size reference.
It is the Bearded Vulture foraging territory, abundant colonies of griffon vulture, and now in winter, a rare bird jewel, the walcreeper (Tychodroma muralis)!
|Bearded vulture (Gypaetus barbatus)|
|Griffon vultures (Gyps fulvus)|
|Wallcreeper (Tychodroma muralis)|
This beautiful Wallcreeper was takin benefit of the sun's rays to eat the few bugs that appear in the heat rock or refuge in the numerous cracks and holes.
So, although it seems that few things to see in winter, actually in all seasons there are many things to see