Ertz 2008-10 claims that this is identical to #370 in his 1979 catalog but apparently this is wrong; Werche has compared images of the two and sees several visible differences in both artists' contributions to the paintings. So the present painting is NOT Ertz 1979 #370 but IS Ertz 2008-10 #484.
This and other variants are closely related to the Munich painting on which Brueghel evidently collaborated with Pieter van Avont. This suggests that Jan's workshop was producing very similar paintings of the same size, on the same support, at the same time, with different collaborators. There must have been thorough pattern drawings. A drawing for part of the garland is now in Antwerp.
Between the three inter-related pictures, the Munich one is of the highest quality, most densely and completely worked. The present work would be the next-most-carefully done. #485, in a private collection, is based on the same pattern but is less careful -- the descriptive upper layer of brushwork is not dense enough to cover the toned ground layer at various places in the garland. All three works have the same garland, landscape, and animals but different arrangements of figures by the second artists.