Hi Nikolas,
Tassie Pink Robins are also slightly heavier than those found on the mainland, in agreement with Bergmann’s Rule (individuals in colder climates have greater body masses than conspecifics in warmer climates). Heavier birds have greater wing-loads, which may be alleviated somewhat by having longer wings, which could explain why Tassie Pink Robins have slightly longer wings.
Cheers, Stephen
Stephen Ambrose Ryde NSW
