Otters: River or Sea? is the most straightforward of the bunch, placing the two different mustelids side by side to compare their physiology, habitats, and family groups...A solid interactive series for larger collections.
After giving basic facts about mustelids, the family to which otters belong, the author presents either side-by-side or alternating pages that look at river otters versus their ocean-dwelling cousins. As is consistent with this series, the photos are the stars, showcasing the similarities and differences among these 13 adorable species. A Spanish edition publishes simultaneously, as does (in both English and Spanish) a similar title on penguins, by Cher Vatalaro.