OOLOGICAL COLLECTION
of
Griffing Bancroft
and
Griffing Bancroft Jr.

Heerrman Gull
A.O.U. No. 57

Blasipus
heerrmani

Incubation fresh Eggs 3

Taken on Isla Raza in the Gulf of California Mexico
April 17, 1925.

There were at a rough estimate which is better than
none at all from one to two hundred thousand birds nest-
ing on the island. Their crude small nests were built
of short twigs and hardly held the eggs off the ground.
We did not find a set of four.

Personally collected,

ORN.E.00203