wasn't hard to track this one down a Wren ringed by myself in November 2017 (JBX257)
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Never thought of looking for rings in owl pellets... Always though they fed on mice and the like.

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Brian, Long-Eareds eat lots of birds these are remains from pelletspic.twitter.com/eh0s32dZJr
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I am doing an owl pellet dissection with my library kids Monday. I doubt we will find anything so fancy, but may I share your phot with them?
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yes !!
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...out of interest, what type of metal are the rings made from? Do they present any health risks to the owl for the duration that its inside them?
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a special lightweight alloy which dosen't rust
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https://twitter.com/lizardschwartz/status/878294670882684929?s=19 … this was my fave pellet. Tawny scavenging some dead pied fly chicks. Wrote it up in BB
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Two Dunlin rings were found recently in SEO pellets collected in East Cork - one from UK, the other from Sweden
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