Nature Notes From Crater Lake
Volume 13, October 1947
Forster's Tern
By Dr. Ruth E Hopson
On June 7, a female Forster's tern,
Sterna forsteri, was found dead near the Lost Creek Ranger Station
at the East Entrance to the park. It was evidently a casualty of the
storms of the first week of June. Forster's terns have not previously
been reported within Crater Lake National Park; this specimen can only
be regarded as accidental.
Post mortem examination revealed that
she had not eaten for some time as no sign of undigested food was found
in the digestive tract. Since these birds are known to nest in the
marshes of Upper Klamath Lake, it is probable that this bird was lost in
the storm and was unable to find suitable food in the unsuitable
habitats afforded by the rugged southern Cascades of which Crater Lake
National Park is a part. This tern is a marsh loving bird which is not
conditioned to timbered areas.