Date: 1/27/19 6:50 am From: Ellie George <elgeorge46...> Subject: [VTBIRD] FW: buckthorn and birds
The forwarded email below contains 2 links to informative articles about buckthorn and birds. It is a much more complicated relationship than it appears at first. Unripe buckthorn fruits contain more emodin and can cause diarrhea in birds and mammals. Ripe fruits contain much less emodin, and in birds, very low levels can cause the fruits to pass through slower than normal. Many species can detect levels of emodin and avoid eating unripe fruits. By winter, wouldn't most fruits be ripe (or overripe)?
As an aside, emodin works to cause diarrhea in mammals and humans. My Labrador retriever, who eats anything organic, and was on-leash for the hike, was eating some of the dropped buckthorn fruits yesterday that the robins had knocked off the trees. Last night she had a hefty bout of diarrhea, so I will be striving to keep her away from buckthorn fruits in the future!
From: <elgeorge46...> <elgeorge46...> Sent: Sunday, January 27, 2019 9:03 AM To: Ellie George <elgeorge46...> Subject: buckthorn