adj.having a beak or bill as specified

"a thick-billed bird"; "a long-billed cap"

THE FIRST DUCK-BILLED DINOSAUR (FAMILY HADROSAURIDAE) FROM ANTARCTICA
EVOLUTION OF POLYGAMY IN THE LONG‐BILLED MARSH WREN
Ivory-billed woodpecker (Campephilus principalis) persists in continental North America.
Ivory-billed woodpecker (Campephilus principalis) persists in continental North America.
Destruction of eggs by the long-billed marsh wren (Telmatodytes palustris palustris)
Comment on "Ivory-billed woodpecker (Campephilus principalis) persists in continental North America".
Age-Specific Reproductive Performance in Red-Billed Choughs Pyrrhocorax pyrrhocorax: Patterns and Processes in a Natural Population
Nest Success, Habitat Utilization and Nest-Site Selection of Long-Billed Curlews in the Columbia Basin, Oregon
Environmental Variability, Life-History Covariation and Cohort Effects in the Red-Billed Chough Pyrrhocorax pyrrhocorax
THE LEVEL OF RESERVE PROTEIN AS THE PROXIMATE FACTOR CONTROLLING THE TIMING OF BREEDING AND CLUTCH‐SIZE IN THE RED‐BILLED QUELEA Q...