'.
La Ventura.--24 deg.48', 100 deg.38'.
Las Delicias.--26 deg.10', 102 deg.49'.
Las Margaritas.--28 deg.42', 101 deg.14'.
Mesa de Tablas.--25 deg.14', 100 deg.24'.
Muzquiz.--27 deg.53', 101 deg.32'.
Nava.--28 deg.25', 100 deg.46'.
Ocampo.--27 deg.22', 102 deg.26'.
Paila.--25 deg.38', 102 deg.09'.
Parras.--25 deg.25', 102 deg.12'.
Piedras Blanca.--29 deg.02', 102 deg.33'.
Piedras Negras.--28 deg.43', 100 deg.32'.
Sabinas.--27 deg.52', 101 deg.07'.
Saltillo.--25 deg.26', 101 deg.00'.
San Antonio de las Alazanas.--25 deg.16', 100 deg.37'.
San Buenaventura.--27 deg.06', 101 deg.32'.
San Francisco.--27 deg.37', 102 deg.37'.
San Geronimo.--28 deg.30', 101 deg.48'.
San Isidro.--27 deg.33', 102 deg.27'.
San Juan de Sabinas.--27 deg.55', 101 deg.17'.
San Lorenzo.--25 deg.28', 102 deg.12'.
San Marcos.--26 deg.41', 102 deg.07'.
San Miguel.--29 deg.14', 101 deg.22'.
San Pedro de las Colonias (San Pedro).--25 deg.45', 102 deg.58'.
Santa Teresa.--26 deg.27', 101 deg.21'.
Tanque Alvarez.--27 deg.56', 102 deg.38'.
Torreon.--25 deg.33', 103 deg.27'.
Villa Acuna.--29 deg.19', 100 deg.56'.

For mountain ranges, the approximate center of the highland of each
range is used as the point of reference.

Pico de Jimulco.--25 deg.08', 103 deg.16'.
Sierra del Carmen.--29 deg.00', 102 deg.30'.
Sierra de la Encantada.--28 deg.25', 102 deg.30'.
Sierra de Guadalupe.--25 deg.13', 101 deg.32'.
Sierra del Pino.--28 deg.15', 103 deg.03'.
Sierra de la Madera.--27 deg.03', 102 deg.30'.

DISTRIBUTION OF THE KNOWN BREEDING BIRDS OF COAHUILA

Topography and Climate

Coahuila lies in the broad northern end of Mexico, immediately east of
the center of the continental mass. The mountains of Coahuila, which
are part of the Rocky Mountain-Sierra Madre Oriental Axis, extend in a
north-south direction and divide the lower lands into two areas, a
larger one, a part of the Central Plateau, to the westward and a
smaller one, a part of the Gulf Coastal Plain, to the northeastward.
Most of the mountains of Coahuila do not exceed 6000 feet in elevation.
A few peaks such as in the Sierra del Carmen, Sierra del Pino, Sierra
de la Madera, Sierra Encarnacion, and Sierra de Guadalupe, are more
than 9000 feet high, and some more than 10,000 feet in elevation occur
near the southeastern border of the State in the Sierra Madre Oriental.
The Gulf Coastal Plain of northeastern Coahuila ranges from 700 feet to
1800 feet. The desert plains of the Mesa del Norte t