Metomidate as sole anaesthetic agent in tawny owls.

Metomidate 1 per cent was administered intramuscularly as the sole anaesthetic agent on 22 occasions to seven tawny owls (Strix aluco). Four deaths occurred, none on the first administration. ECG findings and details of dosage are provided.

Electroretinographically determined spectral sensitivity in the tawny owl (Strix aluco).

The electroretinographic (ERG) responses to single light flashes and to flickering lights were obtained in the tawny owl (Strix aluco). The waveform of the single-flash responses indicated that the owl possesses a duplex retina. Spectral sensitivity was determined with light flickering at a 6 and 25 Hz.