Hackman, C. D.
1967
Measurements
Fairy Tern (Gygis alba)
March 10 Neche Island
30.9 x 42.2 mm. on rock ledge.
Hackman, C. D.
1967
Measurment Nest Descriptions
Red-footed Booby (Sula sula)
March 11 East Island, Fr. Fr. Shoals
1. Nest in Chenopodium empty bird sitting no fresh vegetation, 18" above ground, 13" diameters Constructed of Tribulus + Chenopodium.
2. In Chenopodium, 13" above ground, 12" diameter, slight depression, Tribulus + Chenopodium used in construction Egg pipped, chick just starting out, 41.15 x 62.4 mm.
3. Nest in Tribulus + constructed exclusively of Tribulus. Nest on ground, depth 7", 15" diameters, no egg, fresh vegetation on nest
4. Nest in Chenopodium, constructed of Chenopodium + Tribulus, nest on ground 8" depth, 12" diameter.
5. In Tribulus, supported by two rusted steel girders. Nest 9" deep, 12" diameter, 2" depression.
6. Nest supported by a thin sheet of corrugated roofing turned on edge, constructed of Tribulus. Fresh Boerhaavia in nest w/ some fresh Tribulus. 17" high, 13" diameter. 1 egg, bluish in color: 42 x 58.5 mm.
7. Nest on several boards leaning against an old abandoned lifeboat, construction of Tribulus. Fresh Boerhaavia twigs on nest. New nest - all materials recent. 14" high, 15" diameter.
8 Five nests constructed of Tribulus in Messerschmidt's. 2 under construction, 3 appear finished. None over 18" high, all between 12"-14" diameter. All materials in these nests recent.