Marbled godwit (Limosa fedoa) is one of the most common species at the Guerrero Negro Salt Mine.

The greatest abundance of red knots (Calidris canutus) in Mexico is at the Guerrero Negro Salt Mine.

The western sandpiper (Calidris mauri), one of the most abundant species in general on the peninsula and at the salt mine in particular. (Victor Ayala Perez)

The dunlin (Calidris alpina), a common species at the salt mine.

The red-necked phalarope (Phalaropus lobatus), the most abundant species within the salt mine.

The Willet (Catoptrophorus semipalmatus), a common but not abundant species within the salt mine.

The tricolor phalarope (Phalaropus tricolor) is a less-common species, observed mainly in the fall.

In the salt-mine zone, two species of oystercatchers are seen, the black oystercatcher (Haematopus bachmani) and the American oystercatcher (H. palliatus), but always in low numbers.

Occasionally, oystercatcher hybrids are seen.

Fieldwork conducted at the salt mine includes the capture and banding of western sandpipers (Calidris mauri).

The first red knot (Calidris canutus) banded in Mexico.

During captures, occasionally less-common species appear, such as the stilt sandpiper (Calidris himantopus).

Darts, with a 360-ton capacity, transport the salt to the loading place (El Chaparrito Port).

From El Chaparrito Port the salt is transported to Cedros Island in barges that carry between 10,000 and 14,000 tons.