Creuyrfa diddorol Interesting Heronry

Mae gan Len natur fyddin o wirfoddolwyr sydd yn darllen a chofnodi data diddorol o hen ddyddiaduron

Mae'r dyddiaduron yn dod o sawl man ac mae llawer o ddata diddorol a pwysig yn cael ei gasglu.

Mae un cofnod diweddar yn dod o ddyddiadur ddi enw o Abergele rhwng 1922 - 1944, ac yn nodi cofnod o Greyrfa ym Modedern, Ynys Môn yn 1925. Meddai’r dyddiadur  “ to Holyhead, visited Heronry at Treiorwerth, Bodedern, about a dozen nests, apparently eggs but failed to climb up. Other nests looked half finished”

Mae'r cofnod yma yn gynt na chofnodion sydd wedi casglu gan arolwg nythod Crëyr, ac felly dyma yrru’r cofnod I John Marchant sydd yn rheoli arolwg  Crëyr. Dyma John yn ôl hefo mwy o wybodaeth ddiddorol.

“Max Nicholson's paper from the 1928 survey lists this and Cadnant as the only heronries known to be active in Anglesey at that time.  The notes (British Birds 22: 291) say "+ 8 before 1907, 20 c1907, 10 in 1927". In 1928 there were subgroups of 4 and 2 nests: the first site was founded in 1876 and the second c1918, probably from Plas Tregaion (sic).  The reference cited is:

Forrest, H.E. (1919) Handbook to the Vertebrate Fauna of North Wales”

Mae'r data yma yn rhedeg o 1876 tan heddiw, sydd gennych gofnod i guro hyn?

                                                                                            llun/photo Simon Gillings

Llen natur has an army of volunteers who are examining and extracting data from Historical diaries. These diaries come from various sources and a lot of interesting and valuable data is being collected.

A recent record comes from a nameless diary from the Aberegele area for the years 1922  - 1944 and records a heronry at Boderern Anglesey in 1925. To quote the diary for 3^rd March “ to Holyhead, visited Heronry at Treiorwerth, Bodedern, about a dozen nests, apparently eggs but failed to climb up. Other nests looked half finished”

This record precedes the existing Heronries survey so I submitted the record to John Marchant who organises the Heronries census, who came back with even more interesting information.

“Max Nicholson's paper from the 1928 survey lists this and Cadnant as the only heronries known to be active in Anglesey at that time.  The notes (British Birds 22: 291) say "+ 8 before 1907, 20 c1907, 10 in 1927". In 1928 there were subgroups of 4 and 2 nests: the first site was founded in 1876 and the second c1918, probably from Plas Tregaion (sic).  The reference cited is:

Forrest, H.E. (1919) Handbook to the Vertebrate Fauna of North Wales”

So this data set runs from 1876 to the present, can you beat that ?