I found a pine siskin on one of my feeders, showing all the symptoms of salmonella. After taking all feeders down, I did some Googling and came up with
www.texasstandard.org
www.houstonchronicle.com
All three stories (and others) are from the last week.
Apparently pine siskins a re particularly susceptible to salmonella. The extended migration of very large numbers to Texas and elsewhere has caused outbreaks all over the country.

Why You Should, Temporarily, Take Down Your Bird Feeder
A salmonella outbreak is threatening Texas birds at a critical time for migrant species.

Salmonella is killing Houston's birds. Here’s how you can help them.
Birds in the Houston area are dying, and the cause may surprise you: salmonella. They're...
All three stories (and others) are from the last week.
Apparently pine siskins a re particularly susceptible to salmonella. The extended migration of very large numbers to Texas and elsewhere has caused outbreaks all over the country.
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