Small Woodcreeper species with very long tail spines -- a Long-tailed? The next photo shows the shape of the bill better. There was a Plain Brown Woodcreeper higher up on the other side of this tree trunk. Photographed 1/12/03 10:22:56 by Scott J. Spangenberg at Rancho Naturalista in Tuis/Turrialba, Cartago, CRI using a Canon EOS D60 with a 340.0 mm lens at 1/500 sec and f11.0, exposure bias +0.0 and ISO 1000. Copyright 2003, All Rights Reserved
Image 5 of 7, file: 2003-CRI-4533.JPG in catalog Woodcreeper Species.