{"id":22164,"date":"2026-08-27T11:07:25","date_gmt":"2026-08-27T11:07:25","guid":{"rendered":"https:\/\/www.denmarkfarm.org.uk\/canlyniadau-bioblitz-2026\/"},"modified":"2026-08-27T11:08:48","modified_gmt":"2026-08-27T11:08:48","slug":"canlyniadau-bioblitz-2026","status":"publish","type":"post","link":"https:\/\/www.denmarkfarm.org.uk\/cy\/canlyniadau-bioblitz-2026\/","title":{"rendered":"Canlyniadau BioBlitz 2026"},"content":{"rendered":"\n<p>Ym mis Mehefin, cynhaliwyd BioBlitz llwyddiannus arall yma yn Fferm Denmarc. Gyda chymorth amrywiaeth o arbenigwyr lleol, a gefnogwyd gan lu o wirfoddolwyr ac aelodau o&#8217;r cyhoedd, i olrhain a chofnodi ystod eang o organebau ar draws y cyfoeth o gynefinoedd sydd yma ar y safle. <\/p>\n\n<p>Dechreuodd y diwrnod gyda&#8217;r wawr gyda Carys May o WWBIC (Canolfan Wybodaeth Bioamrywiaeth Gorllewin Cymru) lle aethom allan i wrando ar g\u00f4r y wawr. Gyda defnydd o&#8217;r ap &#8216;Merlin&#8217; rhagorol, cerddasom ar draws y safle gan nodi&#8217;r rhywogaethau adar oedd yn bresennol o&#8217;u galwadau a&#8217;u caneuon. Mae&#8217;n ffordd eithaf dymunol o ddechrau&#8217;r diwrnod gyda&#8217;r golau isel a&#8217;r niwl cynnar, dim ond gwrando ar synau natur o&#8217;n cwmpas. Ymhlith y g\u00e2n, a oedd weithiau&#8217;n gymysgedd o alwadau, gan ffefrynnau fel ein Siff-saffiaid a Titw Glas, clywsom <strong>Telor y Corstir<\/strong> (Locustella naevia) \u2013 aderyn cymharol brin ac un oedd yn newydd i rai ohonom yn Fferm Denmarc.   <\/p>\n\n<p>Daeth ein hymgais nesaf i fyd rhyfeddol bywyd gwyllt drwy law Shane Jones o Adar a Bywyd Gwyllt Ceredigion, a aeth \u00e2 ni i weld bywydau hynod ddiddorol gwyfynod micro a macro. Roedd Shane wedi gosod ei drap dros nos ac aethom yn ofalus drwy&#8217;r preswylwyr un wrth un i arsylwi, cofnodi ac yna eu rhyddhau. Os nad ydych erioed wedi edrych yn agos ar ein rhywogaethau gwyfynod, y mae bron i 2,500 ohonynt yn y DU, yna efallai eich bod wedi colli allan ar y harddwch cynnil a&#8217;r amrywiadau sydd ganddynt. Roedd <strong>Gwyfyn Teigr Coch<\/strong> (Callimorpha dominula) yn un o arwyddoc\u00e2d a ddarganfuwyd. Roedd gan bob un batrymau a lliwiau cymhleth ac roeddent mewn ystod mor eang o siapiau a meintiau nes ei bod yn wirioneddol ysbrydoledig cael cipolwg byr ar eu bywydau.    <\/p>\n\n<p>Ar \u00f4l cinio pizza blasus wedi&#8217;i goginio yn ein popty clom ein hunain, cafodd pobl gyfle i fynd i lawr i&#8217;r llyn i wneud rhywfaint o dipio pyllau gyda mi, i weld beth oedd yn fyw yn y dyfnderoedd tywyll, tra aeth eraill i ffwrdd gyda Paul Turner i gerdded rhai o&#8217;n caeau i arolygu glo\u00ffnnod byw. I lawr wrth y llyn, datgelodd y dipio&#8217;r bywyd dyfrol arferol o berdys d\u0175r i larf\u00e2u gwybedyn y gwanwyn a hyd yn oed gelod fawr, ond uwchben y d\u0175r roedd arddangosfa ddisglair yn cael ei chwarae allan. Mewn brwydr awyr barhaus, roedd yr awyr yn llawn mursennod a gweision y neidr wrth iddynt arddangos, paru a dodwy eu hwyau. Gwelwyd llawer o wahanol rywogaethau, mor anodd ag oedd hynny oherwydd y cyflymder yr hedfanent, gan gynnwys <strong>Gwas y Neidr Llygad Gwyrdd<\/strong> (Isoaeschna isoceles) \u2013 gwas y neidr prin yma yng Nghymru.   <\/p>\n\n<p>Yn \u00f4l gyda&#8217;r glo\u00ffnnod byw, creodd dechrau&#8217;r hyn a fyddai&#8217;n haf eithaf poeth ynghyd \u00e2&#8217;n caeau yn llawn blodau gwyllt y cyfle perffaith i weld ystod dda o enghreifftiau. Er nad oedd unrhyw weld enghreifftiau prinnach, roedd digon i&#8217;w weld ar draws y safle gyda <strong>Sgipwyr<\/strong> yn helaeth a semaphore adenydd fflachlyd y <strong>Foneddiges Peintiedig<\/strong> <em>(Vanessa cardui)<\/em> a&#8217;r <strong>Llyngeswr Coch<\/strong> (<em>Vanessa atalanta<\/em>). <\/p>\n\n<p>Daeth Di Clark o Koru Ecology Associates i&#8217;n helpu gyda&#8217;i harbenigedd ac i&#8217;n hyfforddi sut i olrhain pathewod. Roedd hi wedi gosod 20 twnnel olrhain o gwmpas y safle yn flaenorol i weld a allem ddod o hyd i dystiolaeth o bathewod o&#8217;u holion traed, a adawyd ar gerdyn ar \u00f4l cerdded dros baent llwch siarcol gwlyb (diniwed). Dangosodd Di i ni sut i wirio&#8217;r twneli ac ailosod deunyddiau wrth chwilio am eu holion traed unigryw si\u00e2p &#8216;sleisen pizza&#8217;. Er nad ydym wedi dod o hyd i unrhyw dystiolaeth eto, rydym yn dal i wirio&#8217;n wythnosol a byddwn yn cynnal helfa gnau i weld a allwn o&#8217;r diwedd ddod o hyd i dystiolaeth o&#8217;r cnofil anodd ei ddarganfod.    <\/p>\n\n<p>Daeth Martin Thomas, sy&#8217;n adnabyddus ymhell ac agos am ei arbenigedd gydag ystod o fywyd gwyllt, ond yma&#8217;n fwy penodol gyda mamaliaid bach, i&#8217;n helpu i edrych ar ardal ar y safle lle roedd tystiolaeth wedi&#8217;i darganfod o lygod y cynhaeaf yn nythu. Cawsom ei gyngor a&#8217;i syniadau ar sut orau i symud ymlaen gydag arolygon pellach a&#8217;r ffurfiau gorau o reolaeth. <\/p>\n\n<p>Llenwyd y prynhawn gydag arolwg o goed ar y safle, lle daethom o hyd i ddigon o enghreifftiau o <strong>Coeden Gwas Gwyllt<\/strong> (Sorbus torminalis) \u2013 rhywogaeth anghyffredin yn lleol; arolwg gyda Steve a aeth \u00e2 gwesteion drwy&#8217;r coetir i chwilio am infertebratau daearol, a elwir weithiau&#8217;n anffurfiol yn &#8216;mini-fwystfilod&#8217;, ac arolwg o&#8217;r planhigion a ddarganfuwyd yn ein dol wair lle daethom o hyd i dros 25 o wahanol rywogaethau o laswellt a phlanhigion blodeuol yn ogystal ag ystod eang o infertebratau yn gwneud y gorau o&#8217;r cynefin pwysig hwn.<\/p>\n\n<p>Daeth y diwrnod i ben wrth i&#8217;r cyfnos ddisgyn a daeth pobl yn \u00f4l i&#8217;r safle i gymryd rhan yn yr arolwg ystlumod gyda Carys. Gan ddefnyddio synwyryddion ystlumod i ostwng amlder sgrechiadau ystlumod i s\u0175n clywadwy i bobl, gwelsom a chlywsom gyntaf yr ystlum <strong>Noctule<\/strong> <em>(Nyctalus noctula)<\/em> yn hedfan uwchben o&#8217;i nyth yn wal ein hadeilad swyddfa. Dilynwyd hyn gan ystlumod <strong>Pipistrelle Soprano<\/strong> (<em>Pipistrellus pygmaeus)<\/em> a <strong>Pipistrelle Cyffredin<\/strong> (<em>Pipistrellus pipistrellus<\/em>), yn chwibanu ac yn troelli uwchben yn y cwrt ac uwchben y caeau wrth i ni gerdded i lawr i&#8217;r llyn. Cafwyd llawer o lawenydd yn clywed y s\u0175n &#8216;ffrwt&#8217; neu &#8216;ffrwch&#8217; a wneir gan ystlumod wrth iddynt ddal chwilod! Wrth y llyn, yna gwelsom a chlywsom ystlum <strong>Daubenton<\/strong> <em>(Myotis daubentonii)<\/em> sydd fel arfer i&#8217;w gael uwchben d\u0175r, yn pysgota am bryfed o wyneb y d\u0175r gyda&#8217;u traed mawr neu eu cynffon.    <\/p>\n\n<p>Roedd y diwrnod yn llwyddiant ysgubol ar y cyfan ac mae holl gofnodion y diwrnod wedi&#8217;u hychwanegu at ap WWBIC &#8216;<a href=\"https:\/\/www.lercwales.org.uk\/app.php\"><strong>LERC Cymru<\/strong><\/a>&#8216; i sicrhau bod cofnodion y sir yn cael eu diweddaru ac i&#8217;n helpu i gofnodi a chreu darlun gwell am y bywyd gwyllt yma, sut mae&#8217;n newid dros amser a beth y gallem ddisgwyl ei weld o un flwyddyn i&#8217;r nesaf. <\/p>\n\n<p>Hoffem estyn DIOLCH enfawr i bawb a wirfoddolodd eu hamser i arsylwi, adnabod a chofnodi&#8217;r rhywogaethau ar y safle. Ni allem wneud y digwyddiad hwn hebddoch, ac rydym mor ddiolchgar am eich cefnogaeth. <\/p>\n\n<p>Mae mor bwysig i ni i gyd fod yn rhan o&#8217;r gwaith olrhain hwn o&#8217;n bioamrywiaeth leol i&#8217;n helpu i ddeall sut y gallwn reoli ein tir a&#8217;n hamgylchedd yn well i gefnogi ystod ehangach o rywogaethau. Rhaid i ni i gyd gofio, fodd bynnag, nad yw&#8217;n ymwneud \u00e2&#8217;r unigolion yma yn unig, ond \u00e2 chreu cynefinoedd iach i bawb. Gan fod popeth yn gysylltiedig, mae gan bopeth a wnawn effaith a chanlyniad. Felly, ewch allan, edrychwch ar yr holl natur o&#8217;ch cwmpas a dechreuwch ei chofnodi, fe welwch ei bod yn gaethiwus.    <\/p>\n\n<p>O leiaf, dewch yn \u00f4l i Fferm Denmarc y flwyddyn nesaf ar gyfer BioBlitz &#8217;27 lle rydym yn gobeithio arolygu hyd yn oed mwy.<\/p>\n\n<p>Chris &amp; T\u00eem Fferm Denmarc<\/p>\n<script type=\"text\/javascript\" src=\"https:\/\/www.denmarkfarm.org.uk\/wp-content\/themes\/denmark-farm\/slick\/slick.min.js\"><\/script>\r\n<section class=\"position-relative overflow-hidden pt-4 alignfull mb-5\">\r\n\t<div class=\"position-absolute d-none d-lg-block top-0 start-0\">\r\n                <\/div>\r\n    <div class=\"position-absolute d-none d-lg-block bottom-0 end-0 z-one\">\r\n                <\/div>\r\n\t\r\n\t\t<div id=\"scroll-gallery\" class=\"thumb-scroller\">\t\r\n\t\t\t\t\t\t\t<div class=\"gallery-image card-brushed slides p-2\">    \r\n\t\t\t\t\t<img decoding=\"async\" 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Gyda chymorth amrywiaeth o arbenigwyr lleol, a gefnogwyd gan lu o wirfoddolwyr ac<\/p>\n","protected":false},"author":10725,"featured_media":21680,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1205,1204,1278,1251,1255,1156],"tags":[],"class_list":["post-22164","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bioamrywiaeth","category-bywyd-gwyllt","category-cadwraeth","category-cynaliadwyedd","category-gwirfoddoli","category-uncategorized-cy"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Canlyniadau BioBlitz 2026 - Canolfan Gadwraeth Fferm Denmarc<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.denmarkfarm.org.uk\/cy\/canlyniadau-bioblitz-2026\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Canlyniadau BioBlitz 2026 - Canolfan Gadwraeth Fferm Denmarc\" \/>\n<meta property=\"og:description\" content=\"Ym mis Mehefin, cynhaliwyd BioBlitz llwyddiannus arall yma yn Fferm Denmarc. 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