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A Reintroduction Experiment Involving Mated Pairs Of Parent-Reared Greater Sandhill Cranes In Northern Arizona, Daniel P. Mummert, David H. Ellis, Carol L. Chambers
A Reintroduction Experiment Involving Mated Pairs Of Parent-Reared Greater Sandhill Cranes In Northern Arizona, Daniel P. Mummert, David H. Ellis, Carol L. Chambers
Proceedings of the North American Crane Workshop
In April 1997, 4 mated pairs of adult greater sandhill cranes (Grus canadensis tabida) were abrupt-released at Monnon Lake, Arizona. Five of 8 adult cranes died within 10 days of release. One crane flew from the release area within 10 days after release and was never relocated. One pair of cranes, with 1 pair member sustaining a broken wing 4 days after release, survived for 4 months and demonstrated the importance of maintaining pair bonds after release. The cause of death of at least 5 birds was predation. The high immediate mortality and complete long-term mortality experienced in …
Water Conditioning And Whooping Crane Survival After Release In Florida, George F. Gee, Jane M. Nicolich, Stephen A. Nesbitt, Jeff S. Hatfield, David H. Ellis, Glenn H. Olsen
Water Conditioning And Whooping Crane Survival After Release In Florida, George F. Gee, Jane M. Nicolich, Stephen A. Nesbitt, Jeff S. Hatfield, David H. Ellis, Glenn H. Olsen
Proceedings of the North American Crane Workshop
About 50% of the whooping cranes (Grus americana) released in Florida die within the first year of release. Most of these deaths and those in subsequent years result from bobcat (Lynx rufus) predation. Choosing release sites in open marshes away from bobcat habitat has improved survival. We hypothesized that exposure to ponds (water conditioning) at the rearing site would encourage birds to roost in deeper water marshes after release and such exposure would thereby reduce bobcat predation. In this study, we moved young birds (ca 50 days of age) to netted pens with large (I5-m diameter), deep (30--60 …
A Comparison Of Behavior For Two Cohorts Of Captive-Reared Greater Sandhill Cranes Released In Northern Arizona, Daniel P. Mummert, Carol L. Chambers, David H. Ellis
A Comparison Of Behavior For Two Cohorts Of Captive-Reared Greater Sandhill Cranes Released In Northern Arizona, Daniel P. Mummert, Carol L. Chambers, David H. Ellis
Proceedings of the North American Crane Workshop
To determine how the behavior of greater sandhill cranes (Grus canadensis tabida) changes according to time of year, time of day, and number of days after release, we observed the activities of 2 groups of captive-reared greater sandhill cranes at Mormon Lake, northern Arizona. The behaviors we compared were alert, loafing, sleeping, foraging, preening, locomotion, and other. We found costume-reared subadult greater sandhill cranes that were established at the study site for a year spent more time foraging and being alert towards predators than parent -reared juvenile greater sandhill cranes that were recently released from captivity. We also …