Methods can be adapted to assess survey bias (Caughley 1974, Grier et al. ... of most bald eagle and osprey populations is obtained by using the minimum two- flight aerial survey technique (Postupalsky 1974, ... Two types of literature resources will help to clarify terminology: recovery team plans and manuals ( Grier et al. ... Cessna 150 or 172 aircraft are used in CNF eagle and osprey nesting surveys.
|Title||:||Proceedings of the Midwest Raptor Management Symposium and Workshop|
|Publisher||:||Institute for Wildlife Research National Wildlife Federation - 1991-01-01|