SedumQueen wrote:
The birds can carry seeds from other areas and deposit them in your
yard. Those may be some type of cypress or juniper. If you like
them, leave them and see what happens.

How can you call them cypress or juniper? The OP did not provide any
description of the things growing. They might not even be trees.

I hate to say it again but something smells fishy.

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Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8
Sunset Zone 5