Reports
Record of the Onset Age of Unison Callof Wild Red-crowned Cranes Grus japonensis in Hokkaido, Japan
2020 Volume 52 Issue 2 Pages 129-132
Details
2020 Volume 52 Issue 2 Pages 129-132
In the wild in Hokkaido, Japan, unison calls were observed in two female Red-crowned Cranes Grus japonensis under the age of two. The subsequent situation was unknown in the male and female observed in October 2014, while it was confirmed that the pair observed in October 2018 had been together until at least December 2019.
