After the first two years of records good coverage has been achieved but evidence of breeding is still limited, even for the most common species. On this page we try to help observers improve their levels of breeding evidence. One piece of advice, take a list of codes with you, either on one of the BTO cards or paste a list in your notebook.
Many observers are completing TTVs in spring but not recording any breeding evidence at that time. Usually birds will be found by their singing (Code S) or by being in the right habitat (Code H). Also, a pair will often be seen while doing the TTV (Code P) or one seen carrying nest material (B) or food for young (FF). Sometimes, a displaying bird like a Lapwing will be seen (Code D). All codes should be inserted when TTVs are done. If you forgot to add the codes previously add them now as Roving records thereby at least recording the birds as Possible breeders.
We accept TTVs are not the ideal time to collect breeding evidence needing more lengthy observation so Roving visits will be essential on top of the TTV findings.
An explanation of the breeding codes can be found here. The details are on the TTV instructions provided by the BTO.
We have prepared a table of breeding dates and useful nesting hints for most of the species commonly found in Berkshire tetrads. This table shows how experienced observers have found the species in the past. Have a look at this, especially the last column, to help you find ideas of how to spot breeding evidence on your patch.
Some species start breeding very early in the year. Species to watch out for are listed here:
February
March
Additional help is in the table. Note: The BTO website may question what it calls ‘out of season’ breeding records when you enter them. Don’t worry about this, it is intended to make you think twice, not delete the entry.
Some species breed in many months so, for example, watch out for Robins, Woodpigeons and Collared Doves at all times of the year.
Colin Wilson - 30 November 2009