vtáči spev birdsongs 5 Exclude matching results birds 4 Exclude matching results vtáky 4 Exclude matching results animal ecology 3 Exclude matching results ekológia živočíchov 3 Exclude matching results acoustic communication of animals 2 Exclude matching results fauna 2 Exclude matching results hlasová komunikácia živočíchov 2 Exclude matching results anatómia živočíchov 1 Exclude matching results animal anatomy 1 Exclude matching results elementary school curriculum 1 Exclude matching results hlasová komunikácia zvierat 1 Exclude matching results ornithology 1 Exclude matching results ornitológia 1 Exclude matching results učivo základných škôl 1 Exclude matching results vodné vtáky 1 Exclude matching results vtáci 1 Exclude matching results water birds 1 Exclude matching results