Related references
Note: Only part of the references are listed.
Article
Ornithology
Natural Hybridization between a Little Egret (Egretta garzetta) and a Chinese Pond Heron (Ardeola bacchus) in Japan
Miyuki Mashiko et al.
WATERBIRDS (2012)
Article
Ornithology
Frequency of bird hybrids: does detectability make all the difference?
C Randler
JOURNAL OF ORNITHOLOGY (2004)