The Estonan Ornithological Society invites all bird friends to take part in the winter garden bird survey that takes place on January 29th and 30th..
It is simple to take part in the garden bird survey, and it will take just an hour of your time. For it, you should pick an observation spot with a clear view in a garden or a park for yourself, and preferably near a bird feeder or a bird feeding ground. All bird species encountered there should be noted, and for each species also the largest number of individuals that you saw at the same time.
In this video Henrik Relve gives some advice on how to make the observations: