Boars in Collserola
Written by Lucy Brzoska
I found a palette of colours as autumn turned to winter in Collserola. It’s at this time of year that the variety of trees is most visible: the darker green of holm oak (Quercus ilex), the silvery olives (Olea europaea), the broccoli-green of stone pines (Pinus pinea), and the yellow-brown of deciduous oaks (Quercus cerroides), who are in no hurry to shed their leaves.
The constant rainfall this autumn – not the usual torrential storms, but steady day-long rain – has made moss and lichen flourish. A startling rock by the path is encrusted with orange-yellow lichen on top, and emerald-green moss on the side. The ground is a constellation of moss and earth stars, most of which have already popped. A vivid dark red fungus (a species of Russula) has pushed up through the pine needles, like a mole tunnelling its way out the ground.
A plastic strip tied to a tree guides you up the overgrown terraces, long abandoned. Butcher’s broom grows in the gloom, hung with smooth red balls. A gang of Pekin robins (Leiothrix lutea) express their displeasure at my presence with angry rasping calls. I climb up to the ridge, where spiny Mediterranean gorse (Ulex parviflorus) flowers among the rocks. You can see that Montseny is still powdered with snow, while the Pyrenees are solid icing-sugar white.
Instead of following the ridge back to Vallvidrera, I decide to take the path that skirts the coolest, shadiest corners of the valley. With so few shopping days left before Christmas, it’s very quiet. Probably only a handful of mountain bikers have passed all day. The wings of chaffinches vibrate inside a wild olive. The smallest member of a roving mixed flock, a goldcrest (Regulus regulus), investigates the tip of an oak branch.
The path steepens and it’s almost impossible not to run down . . . straight into a tribe of boars, who scatter through the leaf litter. A male with visible tusks gallops up the slope, where he stands huffing and puffing among the trees, staring belligerently. Poor light and the excitement of the moment has resulted in a less than clear image.
After they finally disperse, I reassure myself that no one in Collserola has ever been attacked by a boar. Their population in the park is estimated at 650 and rising. This season, the hunting clubs of the Collserola region are on strike in retaliation to new restrictions on their activities. Their demands have been partly met: they can continue killing thrushes, for instance. But rabbit shooting is still not permitted in the woods, and the number of days when hunting is allowed in the park has not been increased. So the hunters are envisaging a Collserola so overrun with rampaging boars that the administrative powers will come on bended knee next year and grant them all they desire.
Meanwhile, the boar population is controlled to some extent by forest rangers, who shoot the ones that leave the park limits to explore urban areas. This upsets the residents, some of whom can’t resist feeding the inquisitive beasts and become fond of them. After taming the boars, they have the unpleasant surprise of coming home to a bloodstained street and bodies piled up by their front doors.
The autumnal migration of cranes (Grus grus) into Spain usually takes place inland, over the Pyrenees. On the last weekend of October there was an abrupt change in the weather, with temperatures plummeting and an extremely strong north wind. On 
It’s the time of year for unusual sightings in unexpected places. Recent observations recorded on 
Shortly after being born, this year’s brood of Peregrine falcon chicks were stolen from their nest in one of the Sagrada Familia towers. The robbery took place out of range of the web cam installed. Visitors have no access to this tower, but there are always plenty of workers milling around, since the Sagrada Familia is still under construction. Eduard Durany, responsible for monitoring Barcelona’s Peregrine falcons, emphasises the need for better security. Last year suspicious individuals were spotted trying to take food up to the falcons, who fetch a high price on the black market. After the theft, two chicks born in a wildlife recuperation centre were placed in the nest, but sadly the intended foster parents rejected them. See also the report on the ringing of 
After considerable procrastination, 
The areas of Barcelona nearest to the Collserola hills are now quite used to visits from the natural park’s thriving boar population, particularly at the end of summer when the ground is rock-hard and food supplies scarce. But on Saturday night a family of boars was seen trotting through Gràcia, a central barrio of the city, accessible only after crossing an extremely busy ring road. The same family has been observed this August exploring Gaudí’s Güell Park. There’s a 
