In December, we reported the hatching of 17 nene goslings at the Maui Bird Conservation Center (MBCC) (see Nene Breeding Season Begins Successfully). Since then, three females produced a second clutch, resulting in the successful hatching of eight more healthy goslings.

In January and April, the veterinary team from the San Diego Zoo visited the MBCC to assess the youngsters' suitability for release to the wild. Blood and fecal samples were screened for disease, physical examinations were performed, and an identification microchip was implanted into the neck of each gosling. All 25 goslings were approved for release so, in further preparation for their release, the goslings were sexed and fitted with alternative leg bands for identification in the wild.

On January 24, 2006, 13 goslings were picked up by the Hawaii Division of Forestry & Wildlife (DOFAW) and airlifted by helicopter to a pre-release pen within Haleakala National Park. The first few weeks were spent within the pen so the goslings could acquaint themselves with the terrain and natural foods; they also exercised their wings in anticipation of their first flight. Eventually the youngsters left the release pen and began to explore the dramatic landscape within the crater.

Unfortunately, in the short period between the veterinary examinations and the release date, one gosling developed health problems: a protozoan infection. As a precaution, both the sick bird and its three penmates were treated for the infection, delaying their release. Eventually, the sick gosling fully recovered, and once these goslings were cleared for release they were transferred in March to a release pen at Hana Ula in West Maui. The primary feathers on the wings of these four goslings were clipped to ensure the birds became properly acclimated before flying off. Following a future molt, the birds will be ready for flight and freedom.

Finally, in May, the last seven goslings were also transferred to the crater of Haleakala. One male gosling designated as a new recruit for the captive breeding program was retained at the MBCC.

Meanwhile, all our resident adult nene recently entered their molt, a physiological response to the birds' waning reproductive hormones that signifies the end of breeding activity. In reflecting on the season, the MBCC nene flock can be satisfied with the 24 goslings produced for release in 2006. In doing so, the MBCC has made a valuable contribution to the survival of Hawaii's wild nene population.

Josh Kramer is a Research Fellow at the Maui Bird Conservation Center.

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