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Please remember that many
of the pages in this section include material that has not yet been
published, but is being prepared for publication in the near future.
Please contact me before using any of it.
Nazca
Booby
Sula
granti
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The Nazca Booby was recently split from the Masked Booby Sula
dactylatra. Most published records were made before this split
was made, so the distribution of the two forms at sea is still
not fully known. Nazca Booby would be expected to be the main
species on the Pacific coast and Masked Booby would be the one
expected on the Caribbean coast. However, the known distribution
of the two forms is not as simple as this as Masked Boobies
are also found in the Pacific. The main way to tell the two
forms apart is by bill colour; Nazca Boobies have an orange
coloured bill, while Masked Boobies have a yellow coloured bill.
They are fairly common to common in the waters off the Pacific
coast. On my pelagic trip off the coast of Guatemala on 11th
May, we saw 2 birds and on my pelagic trip off El Salvador on
2nd July, we saw three. One of the birds collected off the coast
of El Salvador had been ringed (banded) in the Galapagos Islands.
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