(Jul 25 cont.) Toward Tail, 3.9 mi S of Guanmuchil we saw 2 more tree ducks & then 18.4 mi N Guanmuchil we saw about 25 black vultures. The town of El Burrian is 22.1 mi N of Guanmuchil. 2.7 mi N El Burrian we noted a meadowlark & 4.2 mi further - about 35 black vultures. 20.4 mi S of the crossing of the Rio del Fuerte we saw a Franklin's Gull, an avocet & a number of resident gulls. 11.2 mi N of the Rio del Fuerte we saw our first White Raven from the West coast, (this was 12.4 mi S of El Carrizo). 44.2 mi S Navojoa we recorded a Sparrow Hawk. About 28 mi N Navojoa there are lots of agave-like plants (fleated?) with grass in between them. Mariani habitat seems to be scarcer than from Navojoa N at least to Fundicion. As you get closer to Cd. Obregon there is lots of open mesquite, but also is lots more herbaceous vegetation & also much cultivated. On the N side of Obregon is is very agricultural agrassy & does not seem to be mariani habitat. On the N side of the Rio Yaqui it reminds me of the country along the Colorado R. near Yuma. Following this is an area of open gravelly desert followed by a thick grassy & scrubby area. Beyond this is open desert again, more sandy also, but still lots of grass & thick areas, some cultivation to at least km. maker 1879 (28.1 mi. S Pitahaya). At this point it seems like mariani