All feathers have a blood vein in them, but the primary, or flight feathers are to longest outermost ones on the wing. They should only be trimmed at the very end well away from the blood vein.
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difference between primary auxiliary verbs and modal verbs
Identify the difference between primary sector and secondary sector
The Cockatiel have 10 primary feathers and 10 secondary feathers.
what are the diffrence between primary reserve and secondary reserve?
The difference between primary data and secondary data is that primary data is the information from the original research.
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Primary can't be recharged, secondary can be recharged.
Speed.