Abstract
Abstract The bird track localities of the Republic of Korea are among the richest and most diverse avian tracksites in the world; however, no behavioral studies have been conducted with them. This paper examines the association of invertebrate traces, avian footprints, and small, enigmatic elongate and double-oval traces from silicone casts (KS001 and KS064) taken from two specimens from the Haman Formation near Jinju. Two distinct types of bird tracks are present: a larger type with a well-defined hallux impression on the majority of the tracks, Koreanaornis isp., and a smaller type without a clear hallux impression, K. hamanensis. Elongate traces interpreted to be peck marks and double-oval traces interpreted to be probe marks were found on KS001. The peck marks range from 4.0 to 11.2 mm long and average 7.6 mm in width. There are two distinct morphologies of probe marks which may represent different species or genera of birds. The large probe mark is 6.9 mm long and 2.9 mm wide, whereas the smaller pro...
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