Summer migrants arrival dates

Previous earliest summer migrants arrival dates for the Treshnish area:
Wheatear: 18th March
Sand Martin: 20th March 2012 (Frachadil)
Chiffchaff: 25th March 2012 (Reudle)
Manx Shearwater: 1 April
Swallow: 7th April
Common Sandpiper: 8th April
Willow Warbler: 9th April
Blackcap: 10th April
Arctic Skua: 10th April
Cuckoo: 13th April
Whinchat: 24th April
Sedge Warbler: 24th April
Tree Pipit: 24th April (Loch Frisa). The only local site is at Kilninian which I under visit. I survey Loch Frisa twice a year but at a fixed date
Whimbrel: 26th April
Whitethroat:: 28th April
Common Tern: 3rd May (earliest photographic record on 6th June)
Grasshopper Warbler: 4th May (only one years records)
Spotted Flycatcher: 6th May
House Martin: 6th May
Swift: 6th May (does not breed on Mull
Arctic Tern: 7th May
Wood Warbler: Insufficient data. Breeds at Quinish, Salen and Tobermory which I under visit. My earliest date is 9th May at Quinish
Pomarine Skua: 9th May at Quinish (passage migrant-2 records at Treshnish 23rd May & 6th Sept)
Turtle Dove: 11th May (only record with a date but seen in previous years)
Corncrake: 11th May (from only 2 years)
Osprey: 13th May (only 3 records)
Quail: 31st May (only 2 records)
Garden Warbler: 3rd June (only 2 records)
Redstart: 13th August (our only record at Reudle)