Birds: Heads of: Great Tit (Passeriformes, Parus major), Common Raven (Passeriformes, Corvus corax), Redshank (Charadriiformes, Tringa totanus), Ruby-throated Hummingbird (Apodiformes, Archilochus colubris), Great Spotted Woodpecker (Piciformes, Dendrocopos major), Greenfinch (Passeriformes, Carduelis chloris), Red-breasted Merganser (Anseriformes, Mergus serrator), Blue-and-yellow Macaw (Psittaciformes, Ara ararauna), Golden Eagle (Falconiformes, Aquila chrysaetos), Common Duck Mullard (Anseriformes, Anas boschas), Grey Heron (Ciconiiformes, Ardea cinerea), Keel-billed Toucan (Piciformes, Ramphastos sulfuratus), illustration Zoology: Ornithology