Wed. Apr. 7, 7 pm After a day's absence, the one adult plumaged Yellow-crowned Night-heron has returned to perch at last year's nest, with no visible partner or progress in refurbishing the tattered old fragment of a nest. The bird had been absent all of yesterday, Tuesday, after being seen briefly in the early morning, but was back when I left for work this morning at 8 am and was visible upon my return at 7 pm this evening. Last year, two birds showed up Mar. 31 and went on to raise five young; this year one bird showed up on Apr. 1; two birds were seen Monday evening but may have been two of the same gender; after a brief fight at the nest (won by the origional arrival bird), the presumed rival perched nearby for about 15 minutes and then flew away unaccompanied by the nest holding bird. It was next day that the bird took a day's leave of absence from the nest area, only to show up 8 am this morning, just after I had posted a report that the bird may have gone. Usually the bird has been present from about 740 am to about 6 pm at the nest, and absent (more often than not) during the night. This pattern fits the book description of the male's shift at the nest, with the female getting nest duty during the night. More reports as more developments occur. Pete Webb Baltimore, Md. pwebb@bcpl.net (home, after 6) pew@niroinc.com (M-F, 830-5)