two 1988 Bulgarian stamps from a series on birds[id: two postage stamps, both with highly detailed a

two 1988 Bulgarian stamps from a series on birds

[id: two postage stamps, both with highly detailed and realistic illustrations of birds. the left depicts a hooded crow with what looks like worm or perhaps a stem in its beak. the hooded crow is depicted against autumn foliage. the right depicts a grey heron in a dynamic pose with a fish in its beak. end id]