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Landsort Birds Diary!

20th April 2017

2017 April Posted on 20 April, 2017 12:58

All nets opened at 0430 with a hint that the SW winds may have allowed some movement of migrants. Unfortunately it was only a hint, as there were just 9 new birds of 6 species caught!

Nets closed at 1100 with the wind increasing in strength.

Some more maintenance and repairs planned for the afternoon, with new planks for SUDD arriving on the last ferry we will be down getting them on site for an couple of hours later on also. I love these 0430 starts and 1800+ finishes. Keeps us busy!

Afternoon turned out wetter than forecast so some time was spent helping Anders by amending the computer map to remove the old power lines that ran North to South down the island when the map was done in 2005. Anders will be producing a new version for the board at the end of the lane.

Just Chris & Kay at the Obs tonight.

Wind: South-west
Wind strength: Strong, 8-13m/s
Temperature: 4
Visibility: Good, 10-20km
Cloud Cover: Partly cloudy, 3-5/8
Precipitation: Dry


Birds
ringed

White Wagtail Sädesärla 1
Wren Gärdsmyg 1
Robin Rödhake 3
Goldcrest Kungsfågel 2
Bullfinch Domherre 1
Yellowhammer Gulsparv 1


Sightings
of note

Whooper Swan Sångsvan 13 Migrating NE
Velvet Scoter Svärta c30 Migrating NE
Velvet Scoter Svärta 4 Migrating NE
White-tailed Eagle Havsörn 1 Flying overhead
Common Buzzard Ormvråk 1 Flying overhead
Eurasian Woodcock Morkulla 1 Stationary
Fieldfare Björktrast 2 Stationary


First capture dates

2017 April Posted on 20 April, 2017 07:31

The attached file shows the first capture dates on Landsort for a range of commonly caught spring migrants, using data from 1988-2016. This evaluation is part of a longer term review of the Observatories data and therefore needs to be viewed as a ‘draft’.

For example, some of the early dates for species like Robin, Blackbird etc might well be of birds that were not on active migration but were over-wintering on the island. More work is taking place to determine to what extent we can account for over-wintering birds in future analyses.

More meaningful than ‘first’ dates of course are the mean dates and on-going analysis is evaluating this and we hope to have more information later this year.

Historically, and in particular in the mid to late 90’s and again in the period 2008-12 there were years when little, if any, ringing took place in April. Future analysis will take account of such bias, but for now it is hoped you find the raw data of interest.

In some previous years the first Ängpiplärka, Stenskvätta, Lövångare, Göktyta and Rödstjart (Meadow Pipit, Wheatear, Willow Warbler, Wryneck and Redstart) had already been caught by todays date, so they should be arriving with us any day now.