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<blockquote data-quote="johnraven" data-source="post: 1581691" data-attributes="member: 14963"><p>My analysis is based on doing a search of the Birdguides database, with the following criteria:</p><p>- East Anglia</p><p>- Scarce or rarer</p><p>- relevant dates</p><p>- First records only</p><p></p><p>I do no cleaning of the data whatsoever, except for identifying a few species I have chosen to exclude (Honey Buzzard and a list of seabird). I simply count the number of records.</p><p></p><p>If you do that search for today you get the following results:</p><p>- Common Crane: Leiston</p><p>- Isabelline Wheatear: Landguard</p><p>- Grey Phalarope: Holme (EXCLUDED - SEABIRD)</p><p>- Common Crane: Martham</p><p>- Montagu's Harrier: Willingham</p><p>- Eleonora's Falcon: Ness Point</p><p></p><p>So that gives 5 records once we exclude the seabirds.</p><p></p><p>You will note a few issues here. Firstly, one of the records was later corrected (Isabelline Wheatear) and one is only a possible (Eleonora's Falcon). Secondly, Common Crane could refer to resident birds. But I simply cant/wont clean so much data by hand, and would need to create an objective rule list in order to do so.</p><p></p><p>Does this matter? Perhaps not, if these sightings can be considered to be "white noise". It's a matter of debate.</p><p></p><p>(Today was a particularly bad day for less meaningful records for this purpose, btw).</p><p></p><p>John</p></blockquote><p></p>
[QUOTE="johnraven, post: 1581691, member: 14963"] My analysis is based on doing a search of the Birdguides database, with the following criteria: - East Anglia - Scarce or rarer - relevant dates - First records only I do no cleaning of the data whatsoever, except for identifying a few species I have chosen to exclude (Honey Buzzard and a list of seabird). I simply count the number of records. If you do that search for today you get the following results: - Common Crane: Leiston - Isabelline Wheatear: Landguard - Grey Phalarope: Holme (EXCLUDED - SEABIRD) - Common Crane: Martham - Montagu's Harrier: Willingham - Eleonora's Falcon: Ness Point So that gives 5 records once we exclude the seabirds. You will note a few issues here. Firstly, one of the records was later corrected (Isabelline Wheatear) and one is only a possible (Eleonora's Falcon). Secondly, Common Crane could refer to resident birds. But I simply cant/wont clean so much data by hand, and would need to create an objective rule list in order to do so. Does this matter? Perhaps not, if these sightings can be considered to be "white noise". It's a matter of debate. (Today was a particularly bad day for less meaningful records for this purpose, btw). John [/QUOTE]
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