The bird confronting the frog is a male brambling, and there is a male chaffinch above. To the left are a female chaffinch and a tree sparrow. The moths are emperor moths, and there is a small tortoiseshell butterfly to the left and painted lady to the right.
There are the remains of a signature and the date 1668 over the hole in the tree trunk, which makes it one of the earliest known dated works by d'Hondecoeter. The attribution to d'Hondecoeter is confirmed by a signed painting (Amsterdam, Rijksmuseum) in which the birds, trees and most of the butterflies and fungi are repeated.