How are the nostrils arranged on an albatross bill?

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Black-browed albatross (Diomedea melanophris) — Procellariiform Black-browed albatross (*Diomedea melanophris*).

In albatrosses, the nostrils are arranged as two separate nasal tubes located on the right and left upper lateral surfaces of the bill.1

This configuration is unique among procellariiforms. While all members of the order Procellariiformes are characterized by their conspicuous tubular nostrils—a feature that gives the group its alternative name, "Tubinares"—other species have their nostrils fused into a single tube positioned on the dorsal midline of the bill.21