Abbreviation explanation

ex. = number of observed birds

ad. = mature bird

juv. = immature bird

p. = pair of birds

nest. = nesting bird

♂ = male

♀ = female

(call) = only bird call

X; X0; X00... = approxiamte number of birds (units, tens, hundreds and so on)

r. - pond

CR - Czech Republic

NO - Norway

(coordinates) - approximate location of the observed species