NATURE IN WALES The Quarterly Journal of the West Wales Field Society Editors R. M. LOCKLEY. P. M. MILES. W. S. PEACH. Editorial Address :-Nature in Wales, Orielton, Pembroke. CONTENTS OF VOL. 3. NUMBER 2. SUMMER, 1957 Page THE BREEDING BIRDS OF A NORTH PEMBROKESHIRE FARM A. K. Kent 421 INDIGESTIBILITY OF THE EGGS OF THE COMMON FROG (Rana temporaria) TO THE COMMON HERON (Ardea c. cinerea) Philip M. Miles. 426 Poa Pratensis SUBSPECIES Subcaerulea, IN N. GLAMORGAN AND S. BRECON. D. M. Barling. 429 NOTES ON DRAGONFLIES IN WALES IN 1956. Bryan L. Sage. 434 MIGRATION RECORDS, (LEPIDOPTERA), WALES. 1956. T. A. W.Davis. 436 FIELD Notes Botanical 437 Insects 439 Birds 442 Mammals 446 SCIENTIFIC LITERATURE 447 BOOK REVIEWS 447 SOCIETY'S NOTES 450 The Editors and their Scientific Advisers endeavour to main- tain a high standard of accuracy but do not accept responsibility for the statements and opinions of the contributors to this Journal. Issued free to all Members of the West Wales Field Society. On sale, price 2s. 6d.