<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">Jon and Diane,<div class=""><br class=""></div><div class="">I suspect it is because there is no further point in defending a food source when it is almost dark, and you won’t be feeding there again on this day. Flowers make new nectar during the night, so probably that’s why they are so programmed to relax aggression at that time. And hummingbird feeders almost always have nectar in them the next morning.</div><div class=""><br class=""></div><div class="">We have seen this many times at our feeders toward the end of the day.</div><div class=""><br class=""></div><div class="">Dennis Paulson</div><div class="">Seattle</div><div class=""><div><br class=""><blockquote type="cite" class=""><div class="">On Dec 29, 2025, at 2:39 PM, Cooper PhD, Jonathan A via Tweeters <<a href="mailto:tweeters@u.washington.edu" class="">tweeters@u.washington.edu</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Hi Tweeters - Our hummingbird feeder is normally the scene of hot disputes, with a competitive male wasting no time to chase off other visitors. The other evening, in the half light, we were surprised to see not one but three, then four, Annas perched around the rim, one at each of the drinking holes. They took it in turns for one to drink while the other three watched, bills up. This went on for several minutes until it got too dark for us to see. Why such peaceful co-existence? </div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Jon Cooper and Diane Doles</div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; direction: ltr; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;">Madrona</div><div class="elementToProof" style="font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><a href="mailto:jcooper@fredhutch.org" class="">jcooper@fredhutch.org</a></div><div class="elementToProof" id="Signature" style="caret-color: rgb(0, 0, 0); font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;"><div class="elementToProof" style="font-family: Aptos, Aptos_EmbeddedFont, Aptos_MSFontService, Calibri, Helvetica, sans-serif; font-size: 12pt;"><br class=""></div><p class="elementToProof" style="margin-top: 1em; margin-bottom: 1em;"><span style="font-family: Calibri, sans-serif; font-size: 11pt;" class=""><br class=""></span></p></div><span style="caret-color: rgb(0, 0, 0); font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">_______________________________________________</span><br style="caret-color: rgb(0, 0, 0); font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><span style="caret-color: rgb(0, 0, 0); font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Tweeters mailing list</span><br style="caret-color: rgb(0, 0, 0); font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="mailto:Tweeters@u.washington.edu" style="font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">Tweeters@u.washington.edu</a><br style="caret-color: rgb(0, 0, 0); font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none;" class=""><a href="http://mailman11.u.washington.edu/mailman/listinfo/tweeters" style="font-family: ArialMT; font-size: 18px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" class="">http://mailman11.u.washington.edu/mailman/listinfo/tweeters</a></div></blockquote></div><br class=""></div></body></html>