Scientific: Corvus monedula

Cymraeg: Jac-y-do

Resident. Distinct but loose colonies nest around suburban areas of the larger towns, in villages, quarries and coastal cliffs.

1982
Maximum aggregation from WAS count, 720, Dryslwyn area, 9 February.

1983
Numbers much reduced in Rhandirmwyn area perhaps consequent to failure of oak-defoliating caterpillars this year. Maximum WBS aggregation, 205, Llanelli, 13 December.

1984
Roost by Dinas Reserve c200, 31 May, c400, 12 June.

1985
150+ Cydweli Rubbish Tip, 27 January; 100+, Dinefwr Deer Park, 31 March; 250, Dinas Reserve, 9 April.

1986
500+ at roost St.David`s Hospital, Carmarthen, 20 February. Usual spring gathering of 250-300, Dinas Reserve in April; c300, Mynydd Betws, 22 October.

1987
Spring gathering c320, Dinas Reserve; c120, Llanarthne, 11 July; c400 flying S.West, Dryslwyn, 4 November; 300/400 at roost, St. David`s Hospital, Carmarthen, November/December.

1988
c300, Halfway, 10 January. Roost of 350-400, St David’s Hospital Carmarthen, January February; c115 feeding on oak caterpillars, Rhandirmwyn, early June; c600, Nantycaws, Llansteffan, probably to roost, 31 December.

1989
Roost of c.100, Llanarthne, 19 January.

1990
A partial albino, Gelli Aur, January. c500 roosting near Ffrwd Fen Nature Reserve, March.

1991
c2500, Llanarthne, 18 February.

1992
A roost at the sewage farm in Bynea held c2000 birds on 11th October.

1993
Account of c.600 was made at Pembrey Airfield on 21st September.

1994
Thirty five pairs bred on the cliffs of Carreg Lymsi, Rhandirmwyn.

The largest flocks comprised 500 birds at Cynghordy on 16th February and 200 alongside the ‘Factory Road’, Pembrey on 24th January. Upper Loughor highest count was 72 in November.

1995
At the Gwenffrwd/Dinas Reserve around 20 birds resident, supplemented by immigrants at time of oak defoliation. Much scarcer as a breeder than 15 years ago, with old crag haunts now largely deserted. A roost of 120 at Cynghordy on 28th April. 260 in August in Upper Loughor.

1996
Up to 400 were roosting at the Goodig, Burry Port from January – March. Other high counts were 250 in October and November and 200 in July at Penclcawydd and 114 in October in Upper Loughor.

1997
Counts included a pre-roost gathering of c 700 at Dafen on 7th February and a flock of 600 at Broad Oak on 6th September. October and November had counts of 145 and 100 respectively in Upper Loughor.

1998
There was a winter roost of 400 at Gwdig, Burry Port.

1999
A gathering of 200 at Pentrepoeth, Idole on 29th March. High counts in Upper Loughor included 200 in September and 159 in January.

2000
129 in January in Upper Loughor.

2001
“June 21: returned home at 1800. The house looked like the set of a Hitchcock film. 30-40 Jackdaws were perched on roof and decking rail as we drove up” This report was from Ffrwd Melin, Pentrecwrt. There were 100 at Pwllau, Taliaris on 25th August, and 300 there on 2nd November.

2002
Four gatherings: 80 Pwllau, Taliaris on 18th February; c50 at Ffosddu on 29th June; 49 back at Pwllau, Taliaris on 1st August and 400/500 at Ferryside on 25th. 65 in May in Upper Loughor

2003
10 at Bancyffordd on 20th February and 2nd March. A maximum at Pwllau, Taliaris of 25 in March. About 1,000 at Oriel Jones abattoir on 20th March. At Merlin’s Hill on 14th July, c700. 81, Mynydd Llanybydder, 28th September.

2004
A roost of 650 at the Pwll lagoon.

2005
Roosts of 500 Bynea January 16th and 450 there February 13th.

2007
A roost of 1100 at Penclacwydd November 15th and c500 Pwll December 18th.