I was wondering if you think this was drawn from life at the Zoo in Amsterdam or a specimen?
Westerman's text says:
"Het voorwerp, waaraan onze beschrijving en afbeelding ontleend zijn, bevond zich onder eene aanzienlijke bezending vogels, onlangs van het schiereiland Malacca aangebragt. De Heer Temminck, die het voor s'rijks museum te Leiden heeft aangekocht, had de goedheid het aan ons ter beschrijving af te staan. Wij betuigen hem onzen opregten dank voor dit nieuwe blijk zijner welwillendheid ten aanzien van het genootschap Natura Artis Magistra."
(= "The object, from which our description and illustration are taken, was among a considerable shipment of birds recently brought in from the Malacca Peninsula. Mr. Temminck, who bought it for the royal museum in Leiden, had the kindness to hand it over to us for description. We express our sincere thanks to him for this new expression of his goodwill towards the society Natura Artis Magistra.")
"
voorwerp" does not suggest a living animal.
Another book says the first volume of the Dutch journal had eight parts ?
You can seen
afleveringen 7-13 bound together at
Bijdragen tot de dierkunde
The "
Eerste Deel" is dated to 1848-1854 on the title page of the Google copy I linked above, which matches the adtes of
afleveringen 1-6. (
Aflevering 7 and 8 were published in 1858 and 1859.) That said, I have seen no evidence that the publisher continued to define multi-
aflevering "
delen" after 1854. On the current Brill website, each individual
aflevering is called a "volume".
Both Bonaparte and Westerman call the habitat of the bird is Malaccas. Why could not Revoil’s bird from Somaliland not be a subspecies?
Yes, indeed -- at subspecies rank,
Machaeramphus revoili Oustalet 1886 is a junior subjective synonym of
Stringonyx anderssoni Gurney 1866 (now
Macheiramphus alcinus anderssoni), OD
here, type locality "Objimbinque, Damaraland" (= Otjimbingwe, Namibia ?).