Wednesday, March 14, 2012

In the Land of the Iberian Lynx


Two of us (Geraldine and Clive) spent a few days in the stronghold of the world's most endangered cat - the Iberian Lynx Lynx pardina. This animal was familiar to us from the fossils we have excavated in prehistoric and medieval sites in Gibraltar and we had had a couple of close encounters with them in Donana in the 1990s. So we decided to travel up into the Sierra Morena north of Andujar to see if we could find old friends.




The habitat of the lynx can be described as open Mediterranean forest though we prefer to call it wooded savannah, a habitat that was typical of the emerged coastal shelf off Gibraltar for thousands of years. Here in Andujar, there are tens of thousands of hectares of this wild country, home of Spanish Imperial Eagles Aquila adalberti, Black Vultures Aegypius monachus and Black Storks Ciconia nigra.



Among the smaller species, Hoopoes Upupa epops (above) and Dartford Warblers Sylvia undata (below) are abundant and widespread.



Red-legged Partridges Alectoris rufa abound here too and are potential prey of the lynxes.



But it is the Rabbit Oryctolagus cuniculus that is the favoured prey, and there are lots in these hills.



For two days the lynxes were proving elusive, only distant views down the valley confirming their presence. But other predators of the rabbit made themselves visible. Geraldine took time to focus on a large adult Ladder Snake Elaphe scalaris


...and the mating dance of the Iberian Wall Lizards Podarcis hispanica.


As the sun started to go down on our last evening we turned our attention to the herds of Red Deer Cervus elaphus, not wanting to admit defeat to ourselves but knowing that there would have to be another time for the lynx.


Then, driving back with a wonderful evening light a movement caught our eyes as two lynxes wandered into Cistus scrub to our left. We saw them for a split second and they were gone! Fifty metres down we paused by a firebreak in hope as the animals had been moving in that direction. Five minutes went by and nothing. The light would soon fade. Then, out of the Cistus emerged a female with a yellow collar, barely 50 metres away! She sat down and waited for her one-year old cub who promptly sat close to her. Cameras were clicking frantically by then as the lynxes seemed more interested in some Magpies Pica pica than in us. This is what we got...


Collared female (left) and one-year old cub (right) with Magpie (middle ground) and Red Deer (background)!




Female (above) and cub (below)


Now the sun could set!



During our stay in these hills we stayed at Villa Matilde which we thouroughly recommend. Our hosts - Merche and Roland - are committed and knowledgeable conservationists. They took wonderful care of us and the evening meals were wonderful! On our return to Gibraltar an email from them confirmed than the collared female had been born in 2008 and was known by the name Elam...










Tuesday, March 6, 2012

Peak Migration of Short-toed Eagle


For over a week now we have seen a most wonderful spectacle - the spring migration of raptors across the Strait of Gibraltar. Many species are now coming through but the star of the show has been the Short-toed Eagle Circaetus gallicus. Many thousands have passed north and today's migration was spectacular. The birds coming through are all adults that are heading for their breeding grounds in Iberia and beyond.



Adults are easy to identify by their heavily barred plumage and dark heads.



Strong westerlies drifted many of these majestic birds towards the Rock of Gibraltar. Flying over the sea in these conditions is hazardous and the birds were visibly exhausted on arrival.




Soon, all the adults will be back in their breeding territories and the short-lived spectacle will be over for another year, but other species will come in instead. Spring raptor migration now continues until June!







Sunday, March 4, 2012

Species Profile - The Eurasian Black Vulture


Today we start a new section of our blog, dedicated to species profiles. We start with the Eurasian Black Vulture Aegypius monachus.


This species is a solitary tree nester that survives in good numbers across large tracts of Central Spain, in Sierra Morena (Andalucia) and parts of Extremadura in particular.




In these remote forests and dehesas (parklands) they share the territory with another Iberian tree nesting jewel - the Spanish Imperial Eagle Aquila adalberti.




The Black Vulture is a species that is typical of the forests of the mid-latitude belt, from Iberia eastwards into Central Asia. Its success has been the exploitation of trees as nest sites, keeping it well clear of the colonies of cliff-nesting Griffon Vultures, and allowing it to reach carcasses ahead of the Griffon.




This has given rise to the established, but false, idea that Griffon Vultures are subordinate to Black Vultures and must wait the arrival of the powerful Black Vulture to tear into the hide of dead animals. While a Black Vulture can oust a Griffon Vulture in a one-to-one contest, and it can even barge into a group, the reality is that it gets easily overwhelmed by a mass of Griffons and often stays along the edge of the activity picking up scraps.





Though considered sedentary, Black Vultures will disperse southwards in autumn and some regularly cross the Strait of Gibraltar between Europe and Africa.




The old territory of al-Andalus remains Europe's stronghold for this rare species, the largest of Palaearctic vultures















Saturday, February 18, 2012

Early Spring in the Marismas


We hear a lot these days about the cold conditions in Europe and how these have forced many Lapwings and other birds south to our area. But the marismas in the south-west function like an African locality more than a European one. Here, spring has been underway for close to two months now and tens of thousands of Swallows have already arrived to breed. So have good numbers of Black Kite, Great Spotted Cuckoos and other species. Today, in these marshes we saw the first Whiskered Terns, just arrived from south of the Sahara. But there were also good numbers of some special birds...



Great White Egrets have been on the increase for some years now and their presence is particularly obvious. Soon they will have to share the pools of water with Purple Herons that will arrive from the tropics.


The winter has been a dry one so many of therse birds are now concentrated on the few pools of freshwater that survive



The Penduline Tit is another reed bed speciality. For now it shares the beds with Cetti's Warblers and wintering Chiffchaffs but Reed and Great Reed Warblers will be arriving soon to establish breeding territories here.



The predators will also have to share the reed beds with newcomers. For now, Marsh Harriers rule the roost here but Black Kites are now arriving and will dominate in numbers.



With remperatures reaching 20 degrees Celsius today, it was hard to fathom that much of Europe is immersed in a cold winter...










Wednesday, September 28, 2011

September Feeding Frenzy in the Strait of Gibraltar


This is the time of year when flying fish are passing through the Strait of Gibraltar. They attract many predators that chase them and catch them below or above the surface of the water. These concentrations provide a unique opportunity to see large concentrations of marine predators. Last Sunday we were able to experience this amazing event. See our blog of 20 September, 2010, for a similar event.


Last year we found them in the Mediterranean, east of Gibraltar, but this time they were in the Strait within view of the mist-covered and imposing Rock. Below are some scenes from this magical event...


Leading the underwater action were Common and Striped Dolphins



On the surface, the main predator was Cory's Shearwater


They wait patiently, and peacefully, in rafts until, that is, the dolphins bring the fish to the surface. Then the squabbling commences!





Just like the smaller vultures at a carcass, the Balearic Shearwaters (below) operate on the fringe as they wait for scraps



Gannets arriving from the Atlantic to winter also join in. Most are juveniles or immatures. There are very few adults right now, most will arrive in October.



These past weeks have been very busy for us in the field, so we need to catch up with a number of stories. So keep visiting our blog!