The ramblings of the warden of this reserve on the Lizard peninsula in west Cornwall, UK, comprising 205 acres of grassland, heathland, arable fields, willow scrub and ponds. It is jointly owned by Cornwall Bird-Watching and Preservation Society and Cornwall Wildlife Trust. Interspersed with the latest news and sightings you will find my retrospective blog outlining the development of the reserve. Please note this is a personal, unofficial account and is not necessarily endorsed by the owners.
Friday, 17 September 2010
Hybridising hirundines?
Nothing too out of the ordinary to report lately. A juvenile Marsh Harrier was found standing in the shallows (thoughts of the Rolling Stones there...) of one of the dragonfly ponds on 3rd. We've had a few waders through: Ringed Plover, Greenshank, Ruff, Whimbrel, Curlew, Dunlin, Green Sandpipers. One of the Curlew had a horribly damaged leg, bending 180° backwards from the knee. The Whimbrel was hobbling a bit too. There's been an average passage of Wheatears, Whinchats, Spotted Flycatchers and Yellow Wagtails. A Wryneck failed to make it on to the farm by a matter of feet last weekend.
And so the rarest bird to pay us a visit this autumn dropped by this morning as I was standing by the Plantlife pond. A bunch of about 15 Swallows came down and skimmed the surface. Amongst them, flying away from me, was one with a big white rump patch. It was not a House Martin. Red-rumped Swallow flashed through my mind for about a nano-second, because as it turned, it was just a Swallow. In every respect except that rump, it looked like a bog-standard young Barn Swallow.
Off they went, gaining height and moving south, leaving me scratching my head and wondering if it was just an aberrantly plumaged Swallow or a hybrid x House Martin. I think the fact that the white patch was regularly-shaped and clearly defined makes the latter the more likely.
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