137 - Casau

Itinerari curt, de 611 metres i 7 seccions, que discorre al voltant del nucli de Casau, a la Vall d’Aran. Es troba situat a 1.171 metres, i s’ha mostrejat des de l’any 2015.

Incorpora prats de dall de l'estatge montà, de caràcter humit. Només puntualment es mostreja també bosc de ribera (una freixeneda a la secció 1). Té un elevat interès per la presència d'espècies que són molt rares o fins i tot inexistents als altres itineraris de la xarxa.

Phenology

The bars show the weekly average butterfly abundance (calculated as the number of specimens per 1000 m) for the set of species recorded in the transect. Dots correspond to the weekly average number of species.

Habitats

The graph shows the relative cover of each habitat type in the whole transect. Since 2000, a botanical characterization has been performed for each itinerary every six years. For itineraries with more than one botanical characterization, you can change from one to another by clicking on the year of characterization.

Sections

The map shows the transect route and the layout of the different sections. The background photograph corresponds to the 1:5000 orthophoto from the Cartographic Institute of Catalonia (ICGC).

Species occurring in this transect

Click to the Table to see the species list ordered by the abundance index average standardized at 100 m. Also, there is the trend each species follows in this itinerary. If you click the trend of any species you will enter Species by itinerary results. For more information about the index and trends calculation see Data analysis

• Icons
• Species (96)

Illustrations by Richard Lewington from Tolman & Lewington (1997) Butterflies of Britain and Europe, translated and published in Spanish by Lynx Edicions.