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A

A Bird in the Bush – a Social History of Birdwatching by Stephen Moss, 13:42

A Country Diary for North Wales by Jan Miller, 18:42

A Gleaming Landscape ed. Martin Wainwright, 22:4

A Natural History of Cardiff Vol III by Mary Gillham, 21:42

A Welsh Leech Book, 8:8(c)

A55, Anglesey, 18:8

Abaty Cymer, 15:38

Abaty Ystrad Fflur, 15:38

Aber Hafren, 21:39

Aber y Ddyfi, 16:12

Aber y Ddyfrdwy, 16:13

Aber y Fawddach, 17:28

Aberdaron, 20:35

Aberffraw, 13:15

Abergarthcelyn, 16:38

Abergwynant, 17:28(c)

Abergwyngregyn, 16:37(c)

Aberkinsey farm, 14:47

Aberleri fields, 17:23

Abersoch, 8:28-29(c)

ACCAC, 10:36(c)

Acer campestre, 6:33 (c)

Acer pseudoplatanus, 6:32-34 (c)

acid rain, 9:4ff, 17, see also pollution, nitrogen

Acronita tridens, gweler dagr dywyll

actinic traps, 20:26ff

Adar Campus Cymru, 15:27

Adar Môn/Birds of Anglesey gan Peter Hope Jones a Paul Whalley, 11:43

adar ysglyfaethus/arolwg yng Nghymru, 2:30-33

adder’s tongue (fern), 15:40

Addysg amgylcheddol, 10:35

Addysg fferm, 21:33

Aderyn Drycin Manaw, 22:32

Adroddiad ar Stiwardiaeth Forol, 18:17

Adroddiad Donaldson, 18:16

Adroddiad Gwyfynod Gogledd Orllewin Cymru, 11:32

afalau surion, 4:35-37

afanc, 22:2

Afon Ddu, 16:14

Afon Dyfrdwy, 9:27-30

Afon Goch, 16:38

Afonydd Cleddau, 16:13

agriculture, diversity of, 1:10; 6:4ff

agri-environment schemes, 1:10; 3:48; 4:16

Agrotis ipsilon, gweler Siani dros dro

Airbus, 11:41; 11:41(c)

Ajax-Lewis, Nigel, 4:4; 5:35; 7:42

Akeroyd, John, 21:42

Alban, 22:39

alder, 1:31(c); 3:38; 11:30; 12:10; 23:27

Alexievich, Svetlana, 16:43

algae, marine, 24:47

algâu, 24:12

alien species, 22:38; 23:26

Allen, Paul, 15:18

Allt Ddu, 20:30ff

Allt Fawr/Penrhyn Llyn, 4:8-10 (c)

Allt y Benglog/gwarchodfa, 6:47 (c)

Alnus glutinosa, see alder

Alpheus glaber, see snapping shrimp                 

Altingham, John, 7:42

aluminium sulphate, 12:21

Amaethyddiaeth, 14:44, 15:27

amaethyddiaeth, arferion hanesyddol (17^eg G), 12:14-17

Amcan 1, 15:28; 23:14(c)

Amcanion Ansawdd Ecolegol, 22:14

amdowellt , 8:29

Amgueddfeydd ac Orielau Cenedlaethol Cymru, 15:36

Amgylchedd Cymru, 16:44

amphibians, data on, 3:19-20

An Illustrated Guide to Upland Vegetation (JNCC), 11:42

An Island Called Smith by Jon Gower, 3:42

Anafon, 16:37

Ancient Tree Hunt, 24:46

Ancient Woodland Project Survey, 12:35

angling, (see also fishing), 9:4ff, 17ff; 10:42; 21:37

angling and bats, 19:14

Animate Earth by Stephan Harding, 23:42

ant, red, 4:6

ap Gwilym, Dafydd, 24:33(c)

ap Rheinallt, Meredudd, 19:8

apple,

     Bardsey, 8:4

     Days, 12:38ff, 48

     identification, 8:5; 12:37

     Welsh domestic varieties, 12:37; 15:14

aquatic species, 13:21-27

Ar Orwel Eryri gan Steve Lewis, 17:42(c)

arable flowers, 7:43, 47

arable plants, 16:41; 18:26

Arable Plants – a Field Guide by Phil Wilson & Miles King, 10:45

Archaeologica Britannica, 11:7(c)

archaeology,18:24; 22:15; 24:26

arctic-alpine species, 24:36

Ardal Cadwraeth Arbennig, 23:12

Ardaloedd Morol â Risg Uchel, 18:16

Aren’t Welsh Birds Brilliant? project, 15:30

Argae'r Hafren, 20:16

Arglwydd Rhys, 15:38

Arllewchwedd, 16:38

Armstrong, Ray, 18:42

Arnold, Richard, 12:30

Aron, Charles, 17:42; 21:6

ash, 3:38

Asiantaeth yr Amgylchedd, 11:41; 12:43; 18:17; 20:32

Aspirin, 20:11(c)

Asplenium obovatum, 4:8-10 (c)

Assembly Sponsored Public Bodies, 1:34

aurochs, 3:16

aviation fuel, 18:45

avocet, 8:17; 9:47

Awdurdod Datblygu Cymru, 12:43