In ornithology, the facial disc is the concave collection of feathers on the face of some birds—most notably owls—surrounding the eyes. The concavity of the facial disc forms a circular …

2006年5月24日 · Barn owls are well known for their conspicuous ruff. The ruff serves as a sound collector (Payne 1971; Coles and Guppy 1988) and is important for sound localization. After …

Barn owls have a characteristic facial ruff, which improves sound localization (Keller et al. 1998, Hausmann et al. 2009). The ruff undergoes massive growth during the 60 days following …

2019年4月9日 · A facial ruff (a ring of stiff feathers) form a curved wall around an owl’s face that acts like a reflector for sound. The ruff increases the surface area over which sound is …

Barn-owl chicks are altricial and scantily feathered when they hatch. Growth of the head and ruff feathers occur at separate times during early maturation. Between II and 30 days after …

In all owl species, the facial plumage forms a parabolic dish, the facial ruff, which is most conspicuous in the the barn owl (Tyto alba). The center of the ruff is formed by auricular …

2009年11月5日 · HRTFs in the barn owl ( Tyto alba) are also shaped by the facial ruff, a specialization that alters interaural time differences (ITD), interaural intensity differences (ILD), …

HRTFs in the barn owl (Tyto alba) are also shaped by the facial ruff, a specialization that alters interaural time differences (ITD), interaural intensity differences (ILD), and the frequency …

2009年11月5日 · HRTFs in the barn owl (Tyto alba) are also shaped by the facial ruff, a specialization that alters interaural time differences (ITD), interaural intensity differences (ILD), …

Owls have large heads, and many species have a complete or partial facial ruff of stiff, sound-reflective feathers that acts as an effective sound collector (Fig. 14.1). In addition, the ears of …