About: http://webisa.webdatacommons.org/212190841

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The calls are often particularly from males and stimulated by a spring burst of testosterone, but that general picture gets a lot more complicated when biologists study individual types of birds.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com