Little Bittern (Ixobrychus minutus) -> Boreal Owl (Ixobrychus minutus) - BirdID's Bird Guide - Nord University

Species:

Little Bittern (Ixobrychus minutus)

Boreal Owl (Aegolius funereus)

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Bittern

Short-eared Owl

Length (cm):

33-38

24-26

Wingspan (cm):

52-58

54-62

Weight (gram):

140-150

100-190

Size group:

Crow-size

Thrush-size

Main Texts:

Appearance:

Usually recognizable by size alone. Distinctly smaller than any congener. Pale wing-panel formed by inner coverts is striking in all plumages, especially in flight. Male with contrasting black and white/buff plumage. Female with dark, but pale fringed back and streaked throat. Immature with streaked, bittern-like plumage, and wing-panel is brown-spotted. Skulky behaviour, and most active at dusk or after dark. Mostly seen in flight when crossing open water. Flight action rapid and clipping, and landing is preceded by short glide.

Sound:

Mostly silent except in breeding season. Song is a series of short, deep, frog-like "gorrk", repeated every 2 seconds. Tone is muffled and hollow, but far-carrying. Flight-call a sharp "ki-ke-ke" or a nasal "ke".

Song:

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See sound file

Distribution:

Wikipedia: map (se also Xeno-canto below)

Ecology:

Birdlife ecology

Links:

Observation.org Latest observations

Video IBC

Image search Flickr NB! May give other species

Sound search at Xeno-canto

Featherbase

CC

Sound recording:Creative Commons,www.xeno-canto.org,Jarek Matusiak,http://creativecommons.org/licenses/by-nc-sa/4.0/

Appearance:

Small owl with large, square head and spotted upperparts. Eyes bright yellow and facial disks white. "Astonished" expression. Size approximates that of Little Owl, but appears more bulky. Head much larger than in Pygmy Owl, and flight pattern includes interspersed glides without bounding. Seldom seen in the open.

Sound:

Song consists of fast series of fairly deep whistling notes "po-po-po-po-po-po-po-po", slightly ascending in pitch, and descending in the last few syllables. Phrase includes up to 25 units. Other calls include a drawn-out, squeaky "kweeat" and some peculiar, explosive sounds with an almost "electronic" quality.

Song: