Duval, E.H. 1999 Journal Las Alturas, Costa Rica June 1999 Monitored nets with Catherine Lindberg (Mich. State U.) and her research crew in the Las Alturas coffee fields, to get a better idea of the birds here and to practice removing birds from the nets. Nets were placed along a stream and up side paths into the coffee fields. Note: Look up the Handbook of Field Methods for Monitoring Landbirds, published by Pacific SW Research Station; P.O. Box 245; Berkeley, CA 94701-0245 phone (510) 559-6300. May 1973 Ralph, C.J.; Geupel, G.R.; Pyle, P.; Martin, T.E., DeSante DF. This booklet includes addresses of equipment suppliers, mist net instructions, and info on molt, skulling, etc. Codes for skulling, as they suggest: N or 0 - no white spots showing; just 1 thin bone layer covering the brain Tor 1 - Trace of pneumatization at very back of skull; an opaque, grey crescent or a small A area. 1-5% pneumatic. L or 2 - < 1/3 pneumatized, but some obvious