I have a Greenwing Macaw who would love to get at my big red dahlias and I have been unable to find them listed on any edible / non-edible lists. Thank you for any info you can offer!
Well, looky what I found. Although it says 'partial list' of toxic plants, there is that San Fran number listed you can call. Or how about checking with your vet, or National Mackaw Association, or whatever.
Here is a link that might be useful: For the birds!
says here only the tuber and leaves are if eaten.