Carlo Bonte, from Belgium, sells on 21 March 2017 a "Unsigned, late 16th / early 17 century, in the manner of Roelandt Savery" Still Life with grapes and exotic birds, a panel painting estimated at 2,000 to 4,000 Euro.
The work doesn't resemble Savery (1576-1639) so much as it does some works by his contemporary Frans Snyders (1579-1657), from which it seems to have copied the style and the use of some birds, even though a straight copy is hard to find. The work isn't good enough to be a Snyders or even a Workshop of Snyders, and is probably best described as a Follower of Frans Snyders. Late 16th century in any case is a bit optimistic for this work, which is firmly seventeenth century.
It's almost as if someone had access to some now lost work by Snyders and copied it, or could use a lot of his preparatory drawings, and created a new composition from them.
I haven't been able to find any other similar work (an outdoors scene where a lot of birds surround some bunches of grapes), usually you have indoor grapes with one or two small birds, or outdoor birds on a tree.
All in all, an unusual and remarkable work, but not by a major artist. The estimate seems about right, perhaps a bit low.
UPDATE: sold for 25,000 Euro, a bit low indeed!!