wrote in message
ups.com...
On Jul 8, 11:49 am, "cat daddy" wrote:

"The golden-cheeked warbler depends on stands of mature Ashe juniper
(blueberry cedar) mixed with deciduous trees including Lacey oak,
Spanish
oak, shin oak, post oak, cedar elm, and escarpment black cherry.

Makes a body wonder what the golden-cheeked warbler depended on before
the introduction of the highly invasive Ashe juniper...

From other stuff I read, mature Junipers (medium sized are 200-300 years
old...) mixed in with the rest of the trees, were wiped out for their wood
and charcoal making by the settlers. They also normally exist in ravines and
are native.
Overgrazing led to erosion of the thin grasslands, the other trees died
out, and fire suppression left the young Ashe junipers to colonize almost
exclusively.
So, they weren't invasive naturally and the warblers were happy, until
the settlers upset the delicate balance.