Emballonuridae
Author
Bonaccorso, Frank
text
2019
2019-10-31
Lynx Edicions
Barcelona
Editor
Wilson, Don E.
Editor
Mittermeier, Russel A.
Handbook of the Mammals of the World – Volume 9 Bats
350
373
book chapter
10.5281/zenodo.3740269
34e4a5a6-881c-4a1a-b64d-6868e12df7fb
978-84-16728-19-0
3740269
21
.
Raffray’s Sheath-tailed Bat
Emballonura raffrayana
French: Emballonure
de
Raffray / German: Raffray-reischwanzfledermaus /
Spanish
:
Embalonuro de
Raffray
Taxonomy
.
EtnôaAEbnura raffrayana
Dobson, 1879
,
“
Gilolo Island.” Corrected
by
O. Thomas in 1914 as “Mefor Island, [= Numfor Island] Geelvink Bay,
Western New
Guinea
[=
West
Papua
,
Indonesia
].
”
D. J. Colgan and S. Soheili in 2008 suggested that the New Ireland population might represent an undescribed subspecies. Three subspecies recognized.
Subspecies and Distribution.
E. r. raffrayana
Dobson, 1878
— Moluccas
(
Halmahera, Gebe, Ambon) and New Guinea, including Schouten Is
(
Biak, Supiori, and Numfor Is), and Yapen I.
E. r. cor
Thomas, 1915
— Bismarck Archipelago (New Ireland and Tabar and Lihir
Is
groups) and Solomon Is (Buka, Bougainville, Choiseul, Santa Isabel, New Georgia, Malaita, and Guadalcanal Is).
E.
r. stresemanniThomas, 1914 - Moluccas (Seram I).
Descriptive notes.
Head-body 37-5-58 mm, tail 10-
5
-14 mm, ear 11-17 mm, hindfoot 5 9 mm, forearm 37-5-47-2 mm; weight 4-2-10-2 g. Raffray’s Sheath-tailed Bat is
sexually
dimorphic in
body
size; females tend to be larger than males. There is also variation among subspecies, with corfrom Bismark Archipelago consistently larger on average in body measurements than
raffrayana
from New Guinea.
Long
,
silky
dorsal fur consists of bicolored hairs: red-brown to dark brown hairs over white bases. Venter is pale gray-brown, with scattered white hairs and some white frosting on hair tips. Exposed skin including flight membranes is blackish brown. Claws on hindfeet are bicolored: brown at bases,
with
white tips. Narrow ear rises
slightly
above crown and terminates in rounded margin. Median channel separates nostrils. Muzzle is nearly hairless. Eyes are conspicuous and larger than most other species of
Em
&
zöonura
.
Habitat
. Raffray’s Sheath-tailed Bat occupies limestone caves and mining tunnels.
Food and Feeding
.
Raffray’s Sheath-tailed Bat is insectivorous and is believed to use aerial feeding and foliage-gleaning.
Breeding
.
Breeding
groups Raffray’s Sheath-tailed Bats consist of males, females, and dependent young
individually
spaced a few centimeters apart. In Papua New Guinea, females
with
nursing young are known from May in Sandaun (
West
Sepik) Province andJune in New Ireland Province.
Activity patterns.
Raffray’s Sheath-tailed Bat is
presumably
crepuscular.
It
roosts on vertical walls with all four appendages in contact with substrate.
Movements, Home range and Social organization.
All male groups of
Raffray’s
Sheathtailed Bats are reported from Sandaun
Province
. Roosting groups typically consisting of 10-30 individuals, but
occasionally
solitary individuals are found. They often cohabit cave
twilight
zones with other species of emballonurids including Small
Asian
Sheathtailed Bats
(
E. alecto
),
Large-eared Sheath-tailed Bats
(
E. dianae
),
and Seri’s Sheathtailed Bat (
E
.
serii
).
On following
pages: 22. New
Guinea
Sheath-tailed Bat
(
Emballonura
furati
);
23. Beccari's Sheath-tailed Bat
(
Emballonura
beccarti
);
24. Large-eared Sheath-tailed Bat
(
Emballonura dianae
);
25. Seri'sSheath-tailed
Bat (
Emballonura
sertii
);
26. Pacific Sheath-tailed Bat
(
Emballonura
semicaudata
);
27. Western Sheath-tailed Bat
(
Paremballonura
tiavato
);
28. Peters's Sheath-tailed Bat
(
Paremballonura atrata
);
29. African Sheath-tailed Bat
(
Coleura
afra
);
30. Seychelles Sheath-tailed Bat
(
Coleura seychellensis
);
31. Madagascar Sheath-tailed Bat
(
Coleura kibomalandy
);
32. Dark Sheath-tailed Bat
(
Mosia nigrescens
);
33. Chestnut Sac-winged Bat
(
Cormura brevirostris
);
34. Gray Sac-winged Bat
(
Balantiopteryx plicata
);
35. Thomas's Sac-winged Bat
(
Balantiopteryx
io);
36. Ecuadorian Sac-winged Bat
(
Balantiopteryx infusca
).
Status and Conservation
.
Classified as Least Concern on
The
IUCN
Red List.
Raffray’s Sheath-tailed Bat has a large distribution and presumably large and stable overall population, and it does not face major threats. Beneficial conservation actions would include protection of roosting caves and use of acoustic surveys to improve understanding the distribution.
Bibliography.
Bonaccorso (1998), Colgan & Soheili (2008),
Flannery
(1995a, 1995b), Leary & Bonaccorso (2008),
Smith
& Hood (1981), Tate & Archbold (1939
a
), Thomas (1914a).