Which species possesses a notably longer bill relative to its body size?
Answer
Black-chinned Hummingbird
When comparing the physical dimensions, the Black-chinned Hummingbird is generally characterized as being slightly longer overall when compared side-by-side with the Costa's. A significant part of this difference is attributed to the bill length; the Black-chinned possesses a notably longer bill. Conversely, the Costa's Hummingbird is described as being shorter and stockier overall, possessing a bill that is slightly shorter in proportion to its body size. This difference can sometimes influence which bird gains a slight advantage when accessing nectar from deeper feeder ports.
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