May 6, L964 
Dear Pat, 
Mil, I made it ;>»re finally after a long lone trip. The Fish aid ildlifle 
people is Minneapolis vere most cooperative to say the very least f and Amadou gave 
ne an extra $200. for bothering to visit hi® in New York. I did stop at both Am 
Arbor and the Americas Museum to look at Pterodroraa. 
First off, it would not be worth your while to visit an rbor*s museum for Pterd 
droroa: The only series there is of ?. mollis mollis ( South frinadad ;'Cirei ), but it | 
happens that atoll is is a Fterodroaa with a chest baud and leeks very like what we were 
seeing at sea last month. Like a boob I forgot to look at the locality of this population 
but I will soon and shall get it to you certainly by Hay 18. Oddly enough, this series 
at Ana Arbor i# ««e of the few «i$siag at the American Museum. If you want this series* 
it would be proper to request that Dr. Humphrey write Dr. Robert Storerm of the UMMZ and 
and ask for it. ‘She American Museum's collections of Pterodroma are excellent and 
you should definitely go and look at this as soars as possible • I believe that they are 
missing only cot species in their series of this genus, and what they have is very good. 
As to the Pterodrwsa from the Pacific with black chest bands and a white venter - 
1. ) Pterodrcea alba ( Phoenix Island Petrel ) - Locality Phoenix islands, Christmas Id. 
and probably several other locations ( Marquesas ) Useful reference specimens in 
American Museum £205598, #194413. Also called j?. paxvirostris. Clapp informs tae that 
the ffcoeaix and Christmas Island birds are enteric the peak stages of their breeding 
cycle and that this bird is often seen over the islands durisu the day ( from 1400 on > 
in sirable flocks, he should have seem this in Jam. and Feb. not April. Probably what 
we have seen is not P. alba . 
2. ) Pterodroma neglect a . and P. a. phill,>pi - Locations - Oemo Isis d. South Pacific, 
aiKl Dneim Island, South Pacific. Useful specimen lumbers from American Museum # 19151b, 
# 191628, #442766, It is larger by 1/3 the sire of a Scaia < P. hypoleuca ) with dark | 
c>test and s@ck £ or dark chest band. 1 think that this is it. j 
3. ) Ptcrodrona armiajoniaaa and P. a^ heraldica - Location r. a. a. Atlantic Ocean, j 
Trinadad Islet » 2tt 269663. Des. Black ^and on Chest with white throat. 
Location Oeao XsiandPacific, ocean, ft 191627. Dark wing lining. This population j 
shows a 'tre&euidoos variation from all black birds to birds with ho black on the venter J 
at all. Sene birds ( vis. specimen # given ) have a well defined black band on the ! 
chest. 
Pat, my best guess is that we are seeing migrating or dispersing birds of 
neglecta or exmi in jtniana. My best recommendation is that you get to tits aeriean 
ssuseum just to look over the specimens. I saw sene .Pterodroma which I have nagging 
suspicions that we saw in January and February. Now that the southern species are dispens¬ 
ing this way you had best be ready with as much information as possible. l« have a lot 
to learn about these critters. 
Pat I hipe that this helps a bit. As for me I ready to pull up stakes here 
and head hoes. In a way 1 as sad to be leaving so many exciting problems, but rest assur¬ 
ed that I’ll be back. My research fear the summer is shaping up well especially in view 
of the past two days conversations. I will keep you ousted on life in the Great Lakes 
and I expect that you and chuck will do the same* Please tell chuck that I edited the 
film as he requested, but since I did not see him that Saturday before leaving I destroyed 
the piece myself. % best wishes to you all, and have a fine vacation - do let ne know 
at 3864 Military St. Port i fur on Michigan ( Phones 98-25551 in ’art Huron ) if you can 
stop by an Arbor in late May. If not, see you at the AGO. 
Jia Ludwig 
