| Birken | a. Birchen; |
| Birken | v. t. [ From 1st Birk. ] To whip with a birch or rod. [ Obs. ] [ 1913 Webster ] |
| Birkenbaum { m } | birch tree [Add to Longdo] |
| Birkenpech { n } | birch pitch; birch bark pitch [Add to Longdo] |
| Birkenrinde { f } | birchbark [Add to Longdo] |
| Birkenzeisig { m } [ ornith. ] | Common Redpoll (Carduelis flammea) [Add to Longdo] |
| Birkentyrann { m } [ ornith. ] | Yellow-bellied Flycatcher [Add to Longdo] |