November 19, 19^9 
Mr. Eugene Kridler 
P. 0. Box 151 
Kailua, Oahu 
Hawaii, 96734 
Dear Gene: 
Thanks for your many shipments of data of the recent weeks. As usual 
I have a few questions to ask on various things. For purposes of conven¬ 
ience, I think I will number the questions so that when you reply to me on 
the tape it will make cross checking easier. 
My first set of questions pertains to the trip report for March-April 
1969. In some instances, there are some ambiguities here that I can't 
quite understand and in a couple other instances I wonder if you have any 
additional data. Following are my questions: 
Nihoa-Necker 
1. In this report for both Nihoa and Necker, you refer to the trip 
taken in 1968 as having been made in September. However, in the 
scientific visit tables you filled out you listed the 
Necker dates as 28-29 August. You did give Nihoa as 24-2/" Sep¬ 
tember, but in the letter you wrote me last year you consistently 
referred to the dates as 24-25 August. Was it actually August? 
And is the 24-25 date correct? 
2. What is the significance of your class data system - a, b, c, 
and d? What does it mean when you have an estimate without r. 
class data symbol? 
Nihoa 
3. On page 3 under Sooty Stora Petrel you remarked that "two in¬ 
dividuals were banded" and that this is first recorded nesting 
of this species on Nihoa. Can you give me any additional in¬ 
formation on this? Were these a pair from the burrow, were both 
birds banded as adults or one of them young, or what? 
4. On page 4 under Blue-faced Booby there is the comment that young 
had hatched. Would I be correct in saying that most nests contained 
eggs but some young had hatched? On all other March visits by far 
the greater proportion of nests have had eggs, so I would suspect 
that some were probably present on Nihoa this trip as well. 
5. For both Brown Booby and Red-footed Booby, the comment is "fcggs 
still being incubated." I assume this means that no young were 
'>seen •and -theft 'meet -nest's -contained -egg-s. 
