Eurasian eagle-owl / Uhu (Bubo bubo)

Wikipedia: Eurasian eagle-owl Source: OTHER 1200px-Uhu-muc.jpg
Classification: Genus Eagle owls (Bubo); Family Strigidae
Deutschland: Brut-, Jahresvogel
Song: Song a very deep "ooho". Continuous, but disyllabic. First syllable emphasized and second syllable rapidly falling in pitch. Quite similar to Long-eared Owl, but deeper and with more pronounced pitch change at end ("release"). [Link]
Calls: Frequency of calls also diagnostic: Typically 8-10 seconds between each "ooho" (2-3 seconds in Long-eared Owl ). Audible at 1 - 4 km distance. Both sexes sing. Has a rich repertoire of contact/alarm calls like a hoarse, heron-like "kreaaak", and an excited, bubbling "hohohohoh". [Link]
Physical details: length=60-75 cm, wingspan=160-188 cm, weight=1800-4200 g
Habitats: Agricultural

🔍 No documented observation