Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 exptools 1/6/84; site ih1ap.UUCP Path: utzoo!watmath!clyde!floyd!vax135!houxz!houxm!ihnp4!ih1ap!weutil From: weutil@ih1ap.UUCP (David Pope) Newsgroups: net.rec.birds Subject: Re: random twitterings Message-ID: <351@ih1ap.UUCP> Date: Thu, 21-Jun-84 14:39:30 EDT Article-I.D.: ih1ap.351 Posted: Thu Jun 21 14:39:30 1984 Date-Received: Fri, 22-Jun-84 06:36:22 EDT References: <1359@pur-phy.UUCP> Organization: AT&T Bell Labs, Naperville, IL Lines: 14 I have witnessed this circular flying pattern you describe in barn swallows, and it is my understanding that these birds will fly like this (sort of 'terrain following') in search of bugs. The bugs fly close to the surface of warmer objects as the evening air cools and the humidity increases. If the chimney were covered with flies, the swifts might be attracted in a similar manner. David L. Pope Mail --> ihnp4!nwuxc!random