The original manuscript gives assignment of all A 1 ͑LO͒ and E͑TO͒ phonon modes and the lowest-frequency A 1 ͑TO͒ mode in bismuth ferrite ͑BiFeO 3 ͒ single crystal. The scattering geometry for observing A 1 ͑TO͒ modes is Y͑ZZ͒Ȳ . However, the room-temperature spectrum in this orientation was quite weak, and the peaks appeared as shoulders over the strong Rayleigh scattering. Therefore, A 1 ͑TO͒ modes could not be extracted accurately due to heavily dominating Rayleigh scattering. At least two of the three higher-frequency A 1 ͑TO͒ modes ͑127, 168, and 212 cm −1 marked with "?" in Fig. 2͒ listed as A 1 ͑TO͒ in Table I are incorrect, because such assignments violate the required alternation of A 1 ͑TO͒ and A 1 ͑LO͒ modes with increasing frequency. The alteration rule follows from the requirement that the poles and zeroes of the dielectric constant along a given axis of any medium must necessarily alternate.

The effect of feeding enrichment on the behavior of three spectacled bears (Tremarctos ornatus) was investigated in a large, complex zoo exhibit. Feeding enrichment significantly extended the time bears spent foraging, but no delayed effect on other behaviors was found. The frequency of stereotypic behaviors performed by an old female and a young adult male was not influenced outside the morning feeding period. As yet, a young adult female has not developed stereotypic behaviors. In the old female, the frequency of stereotypic behavior was inversely correlated with the frequency of resting. In the male, the frequency of stereotypic behavior was inversely correlated with the frequency of social interactions with either female.

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