Sylvia Park managed to take photos of Waxwings in March.
Archive for the ‘Who Has Seen What’ Category
Before dawn on 12th January, 2012 observant watchers of the southeastern sky would have seen two persistent, small clouds which held the imagination. They were of a lenticular shape but their colour was classic ‘mother of pearl’.
These clouds were very bright even though sunrise was 20 or 30 minutes away. This timing and the presence of other small, low, very dark clouds in the same view indicated these iridescent clouds were, from a very high position, catching (and refracting) sunlight that the darker, lower clouds were not.
An additional special feature was virga below both clouds. This developed as one watched and succeeded the clouds, being faintly visible after the original cloud was all but vanished.
Additionally, a clear anvil developed at the top of one cloud – shown in the picture gallery by clicking an image.
There are a few names that could be attached to these clouds: Lenticular, Nacreous, Polar Stratospheric, Iridescent.
Nacreous clouds typically look very filamentous and cover wide areas of the sky, and have the same mother of pearl colouring seen here and are similarly very high in the sky, visible after sunset or before sunrise.
Iridescent clouds are ‘normal’ but sunlight passes through them at the precise angle to display a spectrum of colour, as in this case. The spectrum can be affected by the cloud composition as well – that may be water droplets, ice crystals, or nitric or sulfuric acids in water.
Here are some references for these types of cloud:
Polar Stratospheric Clouds, or also Nacreous Clouds
Virga , or fallstreaks, or precipitation shafts
This whole cloud performance was over in 15 minutes. Watchers before or after would have no idea what took place.
EPOD ( a service of NASA’s Earth Science Division and the EOS Project Science Office (at Goddard Space Flight Center), and the Universities Space Research Association ) has suggested that these clouds were Nacreous Clouds and they have published David’s photo as their photo of the day on Valentine’s Day – see comment, below, of 15th February.
Please let us know of early sightings of frog spawn in Sutherland or Ross-shire.
Please report your first sighting this year and where that was.
If you are checking for early frog spawn and want to report it please add a comment below with date and location with these details, (minimum essentials shown in bold):
HERE. Every single observation helps build the bigger picture.
This is a wasp found on McAllister’s wall today 22 December 2011: Continue reading “A Wasp in Winter” »
Russell has taken very good pictures of a Greater sandplover at Dornoch beach on 16th June 2011.
A very pleasant day for visiting this new bird hide. It is accessed from Golspie, down the Littleferry Road, not far after passing the southern end of the golf course a stylish wooden gate marks the entrance.
A flat walk of under 1km brings you to the hide.
At the new Hope Gate, the western entrance to The Royal Botanic Gardens, Edinburgh, David and Heather spotted a local tree.
Well, it is an etching of two local Aspen trees. Dornoch, Sutherland artist Ian Westacott has an exhibition of ‘Venerable Trees‘ now being displayed at the Hope Gate.
These Aspen trees are growing west of Ardgay, near a Champion Tree, also Aspen, as described by John Miller. John Miller has lead two TDFC excursions examining local trees.
Betty Wright has kindly lent a photograph of Ian Westacott’s Aspen trees which gives insight into how they are an inspiring pair.
These trees can be seen growing in a fenceline by Dounie just west of Gledfield, Ardgay, in plain view of the road.
Another local tree is in Ian Westacott’s exhibition, this one is called the ‘No Worry Tree’.
This tree is in the Gearrchoille, Ardgay. We have no photo of it. Can you supply one?
Who has seen frog spawn this spring in Ross-shire or Sutherland? Continue reading “First Frog Spawn — 2011” »
Hi Folks – Grasshopper Warbler in residence at Inchindown this summer, (Forestry “walkers welcome” path off the road between Scotsburn and Ardross. OS: NH 684 738). Continue reading “Grasshopper Warbler in residence at Inchindown” »
Last night, 29th – 30th July, there was a great display of Nacreous Clouds, or 2, at 03:00, early morning of the 30th. Continue reading “Nacreous Clouds over Sutherland” »