Nordic Waders

Wood sandpiper

I am just returned from northern Norway where I was helping my brother, Skitts, with his long-term study of breeding waders. However, as in Scotland this spring, there have been almost incessant northerly winds there. This has led to a late thaw and emergence of plants and insects, and very few birds were breeding compared with the amount in years of more usual weather. 

Wood sandpiper, which was caught and ringed

In one mire where there would normally have been twenty-forty pairs of wood sandpipers breeding there was only one pair with chicks. In some mires there were none. And it was similar story with spotted redshank and reeve. Red-necked phalaropes were particularly scarce, probably because they are surface feeders and as there were very few mosquitoes emerging they had no food supply.

Ringing a wood sandpiper chick.

Of the two main study species, jack snipe did not seem to be breeding at all, although several birds were seen displaying. And less than a quarter of the expected number of  broad-billed sandpiper were breeding.

Adult, (1st year) broad-billed sandpiper caught and colour-ringed for identification in the field in subsequent years of study.

Unfortunately, a high proportion of clutches from the few that were laid were eaten by predators. This was probably mostly by hooded crows which were walking over the mies, in large flocks of twenty or more birds, feeding on emerging cranefly. They would have welcomed any eggs they came across in the process. We also saw several red foxes roaming the area, and they would have been likely predators too.

Sandwich Terns

I was out ringing sandwich terns last week, as well as reading rings in the field. This was all part of a study organised by Grampian Ringing Group, and focused on the tern colony at the Sands of Forvie nature reserve  at Newburgh in Scotland.

One of the birds we read the colour ring number on, had been sighted in Namibia in February, and several others were birds reared at the colony over the past twelve years.

Many birds were flying in with fish, so I tried to capture as many of these as possible, to identify what prey they were feeding on. This could prove useful in future if the fish stocks change and effect the birds' breeding performance.

And as the evening light was so good I took some illustrative shots of the birds.

The whole experience was wonderful, such a busy, noisy, spectacle.

Ancient rocks 

I was up on Arkle last week, a mountain in the the north-west Highlands. This is a land of complex geology and marvellous landforms. The hill is topped by 500 million year old quartzite, laid down in shallow seas. 

Now it is 250m above sea level and forms a hard stony surface, breaking down into screes and coarse nutrient-poor soils - a desert like place.

Few plants can gain hold and find a niche to live on these wind-scoured tops, but here a single bud of Thrift comes into bloom amongst the sharp rocks.

Water has collected on part of the lower plateau forming a lochan which shines blue in the white landscape, due to the nutrient poor water and few plants or animal life that can live in it.

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Stuart

Dead eagle chick

While checking golden eagle breeding success this week Derek Spencer (above) and I found this dead chick in one eyrie. It had died when about three days old, which would perhaps fit with how long it could live off the nutrients held its yolk sac post hatching. Had it died due to insufficient food being brought to it by its parents, or was it a sickly bird from hatch? The body will be analysed for clues to what happened. The chick's head and feet had been eaten, by an adult bird, or some scavenger? 

Several of the eagle nests we checked were empty. There has been a prolonged period of cold, snowy, northerly winds this spring and perhaps this has caused some birds to abandon their breeding attempts for this year.