This time just a short post to talk about some interesting inhabitants of limestone cliffs. Last week we made an afternoon visit to the the Karst edge, checking an excellent wintering site of the amazing WallcreeperTichodroma muraria. This rare breeding bird is usually difficult to find in the Alps where it often breeds in inaccessible places, while it is much easier to observe in winter at lower elevations around the Karst. As you can see from the pics and video, we were very successful in finding not one, but three different individuals: two were together on the same cliff, while a third was seen a couple of hundred metres away on another limestone wall. The one in the video was particularly showy and we even managed to photograph it alongside a clump of Tommasini's SandwortMoehringia tommasinii, a rare endemic plant along the Karst edge of Slovenia, NW Croatia and NE Italy. There are only 6 localities where the species grows - isn't that amazing? The plant wasn't in flower unfortunately, but this is how it usually looks in spring.
In the same cliff there was a noisy pair of PeregrinesFalco peregrinus being in constant dispute with a pair of RavensCorvus corax building their nest on a low cliff ledge. We even managed to identify one of the Peregrines as an individual we caught and satellite-tagged in spring 2020, as it still had the small device with antenna attached to its back (and still delivering data to our colleague's PC!).
There's always something interesting to see on the Karst edge at this time of year, as spring here seems to arrive earlier than elsewhere. It won't be long until the first Alpine Swifts Apus melba & Blue Rock Thrushes Monticola solitarius return...
Blogging has been very slow lately, partly because of work and other commitments and partly because of the season's typical "wildlife emptiness". Field activity has been reduced to a minimum also because of the poor weather, although there were the "usual circuits" we've been still working regularly, including Škocjanski zatok and the Karst around home. However we will begin this post with something more "exotic". Last weekend we descended from the cold and wind-swept Karst and went looking for some early spring signs in the Dragonja valley in Istria (close to the border with Croatia). We visited a nice little tributary of the river Dragonja, with a rather famous waterfall, where Maidenhair FernAdiantum capillus-veneris grows. In Slovenia this Mediterranean species of fern is scarce and localised to the warmer areas of the Primorska region, where it grows on wet travertine rocks. Istria is the best place to see this interesting plant, although we also have a relict location in the Karst at Škocjanske jame (Škocjan caves), where it grows alongside alpine species such as Bear's Ear Primula auricula. Along the little stream and right under the waterfall we admired good numbers of the fern, although not all the plants have sprouted their fresh stems yet. Given the very low temperatures of the past days, some of the plants were ice-covered - something which is probably not very common to observe in this Mediterranean species. The first tiny blooms of Cornelian Cherry Cornus mas and several PrimrosesPrimula vulgaris cheered us up a bit... but not too much (as true spring is not that near after all). Further downstream along the river Dragonja we came across another rare Mediterranean plant (although very common in Croatia), the Prickly JuniperJuniperus oxycedrus, the red-berried cousin of the more widespread Common Juniper Juniperus communis.
The tributary of the Dragonja, disappearing down a rocky ledge.
The waterfall from below, where a rather deep pool is formed.
The stream plunges down a block of flysch in a quite scenic way.
Maidenhair FernAdiantum capillus-veneris
Travertine rocks formed with the accumulation of calcium carbonate deposited by water.
Cornelian CherryCornus mas
Prickly JuniperJuniperus oxycedrus
Moving downstream the Dragonja valley we decided to take a look at the Sečovlje salinas (saltworks), an area rich with birds that we visit only occasionally. The long walk along the final part of the Dragonja and down to its estuary produced the expected mix of common waterbirds, including lots of ShelducksTadorna tadorna, several Common SandpipersActitis hypoleucos, a Marsh HarrierCircus aeruginosus, singing Water RailRallus aquaticus, a Pygmy CormorantMicrocarbo pygmaeus and others. More interesting was the sea where we found a group of 4 Slavonian GrebesPodiceps auritus, a Black-throated DiverGavia arctica and good numbers of Red-breasted MergansersMergus serrator and Black-necked GrebesPodiceps nigricollis - all typical winter visitors in the Adriatic. In the late afternoon we scanned the ruins of the old saltworker's houses and spotted no less than 3 Little OwlsAthene noctua. It is always a pleasure to find and observe this rather scarce species in Slovenia, nowadays almost confined to the very western part of the country.
Three shiny white cheeks...
Slavonian GrebesPodiceps auritus
Black-necked GrebePodiceps nigricollis
Pygmy CormorantMicrocarbo pygmaeus
Reed BuntingEmberiza schoeniclus
Red-breasted MerganserMergus serrator
Little EgretEgretta garzetta
Little OwlAthene noctua
Spot the owl.
Birding the saltworks.
Saltworker's houses with the Italian Alps (on the other side of the gulf) in the background.
If there's one thing that hardly changes throughout the year (regardless of outside events) and dictates the tempo of the seasons is the regular weekly bird monitoring at Škocjanski zatok. Although waterbird numbers are the highest in winter, this season brings little variety of species and therefore little entertainment. However, in the course of the past month we managed to gather several (locally) interesting sightings. Perhaps best of all was a flock of 298 LapwingsVanellus vanellus stopping at the wetland during their northward migration, which represented the highest count for this species at the reserve. Hidden among Lapwings were also two Golden PloversPluvialis apricaria (a rare species at the reserve). Among all the common dabbling ducks that regularly occur at Škocjanski zatok, the rarest is, inexplicably, the PintailAnas acuta. We are therefore always happy when we find this species, like we did recently, when a group of 7 was resting in the lagoon. Other interesting/unusual species observed in the past month included Spotted RedshankTringa erythropus and FieldfareTurdus pilaris, but for more you should check Škocjanski zatok's FB page (& website) where you can follow the regular updates, with almost-complete check-lists uploaded on a weekly basis. Also, this week the reserve has re-opened to the public after the lockdown, so you're welcome to visit!
Golden PloversPluvialis apricaria hiding in the halophytes.
Winter wildfowl mix - name the species.
Courting GadwallsMareca strepera
Penduline TitRemiz pendulinus
To round up the post we'll also mention some of the interesting sightings from our local area in the Karst. Although the landscape is still very much wintry, woodpeckers are beginning to be very active in the woodlands, while also Eagle Owls Bubo bubo have started to advertise their territory on several locations not far from home. Our short wanderings around the Karst have mostly included scouting for new locations (searching for nests, territories ect.) as well as admiring the local hydrogeological features of this extremely interesting area. Smartworking has also enabled us to do some regular office birding, livening up those dark rainy and cold days in front of the pc. A relatively large flock of around 60 SiskinsSpinus spinus has been present at our feeders recently, similarly to the Hawfinches we had last year at the end of winter. SparrowhawksAccipiter nisus also make regular incursions into the garden but only seldom pose well like in the below photos. On calm evenings the first migrant Mute SwansCygnus olor are visible overhead and will be soon followed by the late winter flow of geese, ducks and Cranes Grus grus moving north to their breeding grounds. Needles to say, we are eagerly waiting to see what the start of the spring season will bring!
SiskinsSpinus spinus from the bedroom's window.
Lesser Spotted WoodpeckerDryobates minor
Black WoodpeckerDryocopus martius
Great Grey ShrikeLanius excubitor
Mute SwansCygnus olor migrating low above a Karstic woodland.