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Fig. 2 | Animal Biotelemetry

Fig. 2

From: Energy savings due to the use of shallow body temperature reduction in overwintering Northern Cardinals

Fig. 2

Average body temperatures across the day of cardinals in semi-natural aviaries during summer and winter. iButton loggers implanted into the abdominal cavity recorded body temperature every 5 min. Overwintering cardinals do not undergo torpor; however, nighttime body temperatures were about 1.3 °C lower in winter-acclimatized cardinals. Daytime body temperatures were not quite 1 °C lower in winter-acclimatized cardinals. Both nighttime and daytime body temperatures were highly significantly influenced by season. Data are presented as mean ± SEM

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