Fig. 3
From: Southern elephant seal vagrants in Ecuador: a symptom of La Niña events?
External morphological comparisons illustrating the morphological differences of the adult male M. leonina observed in Milagro River, Ecuador (a) versus an adult male M. angustirostris observed in the San Benito Islands, Mexico (b). Adult (c) and subadult (d) males of M. leonina observed in the Peninsula of Valdez, Argentina, are also shown here as comparative references to corroborate the species identification. Note the shorter length of the proboscis in M. leonina adult male (a) compared to the longer proboscis of an adult male of M. angustirostris (b), which is a key distinctive feature to differentiate M. leonina from M. angustirostris