Field notes, v1307
Page 199
Image from the Biodiversity Heritage Library. Contributed by Museum of Vertebrate Zoology, University of California, Berkeley. | www.biodiversitylibrary.org
Transcription
Greene, H. 1990 November 5 on the forest trail, getting a big ? Teptolepis on a shrub (continued) (see catalogue for details on frog captures) just out of camp. Took #30 minutes to get to the stream since I kept checking trailside plants for snakes and sleeping lizards - nothing. Waded upstream from the second crossing (leaving a large red flag so as not to miss the little trail in the way rocks! There are scattered Hyperdius calling, and several Rara angloensis and cf. Petropedetes in ferns growing from mossy boulders in the fast ripples. Walking in the stream and catching them I think about Dipsadoboa in its powder blue green livery, searching stream banks for Rara angolensis - surely the color (which to me is strikingly reminiscent of Boiga cyanea of SE Asia and Bothriechis vicitor of Central America) is cryptic when the snake is asleep on vegetation in the daytime. That is a different sleeping strategy than comparable frog-eating snakes in the neotropics (e.g., Leptodeira deepsi in Honduras), but maybe at this altitude the snakes need to be exposed in the daytime even though they as nocturnal, in order to thermoregulate and digest prey. Just as I was returning to the trail, looked up to see a little tree frog perpendicular to the small branch on which it sat, # 3 m over the stream. That is fun to see, and brought back very pleasant memories of Costa Rica. On the trail back, encountered Jens and Bob who had found a Dipsadoboa # 8' above the stream on a vertical, moss covered branch, extended and motionless - as Jens called to Bob, the