Contents

Editorial (p.iii)

Bruce Osborne

In this issue (p. v)

Bruce Osborne

A tornado with anticyclonic rotation at Clooncan, Co. Mayo (p. 1)

John G. Tyrrell

Vegetation analysis of upland Burren grasslands of conservation interest (p. 11)

Sharon Parr, Grace O’Donovan, Stephen Ward and John A. Finn

Abundance estimate and acoustic monitoring of harbour porpoises (Phocoena phocoena (L.)) in the Blasket Islands’ candidate Special Area of Conservation (p. 35)

Simon Berrow, Joanne O’Brien, Ian O’Connor and David McGrath

A preliminary assessment of the distribution of the sea lamprey (Petromyzon marinus L.), river lamprey (Lampetra fluviatilis (L.)) and brook lamprey (Lampetra planeri (Bloch)) in Northern Ireland (p. 47)

C.E. Goodwin, J.T.A. Dick and R.W. Elwood

Lead poisoning in mute swans (Cygnus olor) in Ireland: recent changes (p. 53)

Merita M. O’Connell, Patrick Smiddy and John O’Halloran

Book review (p. 61)