Translator Disclaimer
1 June 2007 Diet, Echolocation Calls, and Phylogenetic Affinities of the Great Evening Bat (Ia io; Vespertilionidae): Another Carnivorous Bat
Author Affiliations +
Abstract

We studied the great evening bat (Ia io) in India (Meghalaya) and China (Guizhou), and present the 1st account of its feeding behavior. We analyzed droppings collected from 119 bats between November and May 2001–2002 and 2002–2003 from India; 28 included bird feathers, with most of these containing 90–100% feathers by volume. The main constituent of the diet overall was Coleoptera, although Lepidoptera and traces of Diptera, Orthoptera, and Hemiptera also were found. In China, bats were captured in early November, and fresh droppings also were collected from underneath the roost. Bird feathers comprised 82% of the droppings of bats by volume. I. io emits relatively low-frequency echolocation calls and sometimes produces 2-toned calls, a characteristic of species that echolocate distant targets. I. io has a high wing loading (15.4 Nm−2), average aspect ratio (6.9), and a high tip shape index (1.1), features associated with fast efficient flight. Phylogenetic analysis of a concatenation of mitochondrial ND1 and cytochrome-b genes indicated that I. io is phylogenetically close to Scotomanes ornatus, in a clade (Nycticeiini) distinct from bats in the genus Pipistrellus with which it has been previously allied. Although I. io converges in wing shape and echolocation call design with the carnivorous, fast-flying Nyctalus lasiopterus, its carnivorous behavior likely evolved independently because the 2 species are not close relatives. It is unlikely that I. io captured birds nesting or roosting at the study caves, and its morphology and echolocation behavior seem well adapted for the capture of large aerial insects and flying birds.

Adora Thabah, Gang Li, Yinan Wang, Bing Liang, Kailiang Hu, Shuyi Zhang, and Gareth Jones "Diet, Echolocation Calls, and Phylogenetic Affinities of the Great Evening Bat (Ia io; Vespertilionidae): Another Carnivorous Bat," Journal of Mammalogy 88(3), 728-735, (1 June 2007). https://doi.org/10.1644/06-MAMM-A-167R1.1
Accepted: 1 November 2006; Published: 1 June 2007
JOURNAL ARTICLE
8 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top