Definition of primary feather in English:
Any of the largest flight feathers in a bird’s wing, growing from the manus.
- Like typical swifts, treeswifts have a long manus and primary feathers.
- It is very agile in flight, helped by broad wings with the primary feathers separated into ‘fingers'.
- These birds can't fly away because a few primary feathers on one wing are kept clipped.
Definition of primary feather in:
- US English dictionary
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