Dictionary of the Lithuanian Language.
ulbutis — 2 ulbùtis, ė smob. (2) kas ulba: Čiulba ulbutis, gieda lakštutis ant putino šakelės LTR(Ant) … Dictionary of the Lithuanian Language
uldutis — uldùtis, ė smob. (2) žr. 2 ulbutis: Čiulba ulba uldùtis (d.) Slk … Dictionary of the Lithuanian Language