Silhouette Images Contributed by Matt Wilkins

9 silhouette images in all.

Licenses

Podargus strigoides by Matt Wilkins (CC0 1.0)Aegithalos caudatus by Matt Wilkins (photo by Andreas Trepte, www.photo-natur.net) (CC BY 3.0)Malacoptila panamensis by Matt Wilkins (Photo by Len Blumin) (CC BY 3.0)Prunella modularis by Matt Wilkins (CC0 1.0)Cistothorus platensis by Matt Wilkins (CC0 1.0)Hirundo rustica by Matt Wilkins (CC0 1.0)Acanthiza lineata by Matt Wilkins (photo by Patrick Kavanagh) (CC0 1.0)Xanthocephalus xanthocephalus by Matt Wilkins (CC0 1.0)Zonotrichia leucophrys by Matt Wilkins (CC0 1.0)