Correction to: Spontaneous rhythms in a harbor seal pup calls.

Following publication of the original article [1], the author reported an error in the first sentence of the 'Sound recordings' section. The recordings mentioned in this sentence were performed 6 days later than written. In this Correction article the original and corrected version of the sentence are presented.

Correction to: BMC Res Notes (2018) 11:3 10.1186/s13104-017-3107-6

Following publication of the original article [1], the author reported an error in the first sentence of the ‘Sound recordings’ section. The recordings mentioned in this sentence were performed 6 days later than written. In this Correction article the original and corrected version of the sentence are presented.

The incorrect sentence upon publication:

On the twenty-first day from estimated birth, 10 min of vocalizations were recorded in air using a unidirectional microphone Sennheiser ME-66 (frequency response 40–20,000 Hz ± 2.5 dB; Sennheiser electronic GmbH&Co. KG, Wedemark, Germany) [14].

The corrected sentence:

On the twenty-seventh day from estimated birth, 10 min of vocalizations were recorded in air using a unidirectional microphone Sennheiser ME-66 (frequency response 40–20,000 Hz ± 2.5 dB; Sennheiser electronic GmbH&Co. KG, Wedemark, Germany) [14].

The reference which is cited in the above sentence can be reviewed in the original article.