There are errors in the notes I kept in my first birding field guide, but no surprises.
I recently browsed my early birding history, noted in Roger Tory Peterson's "A Field Guide to the Birds, Giving Field Marks of All Species Found East of the Rockies." It was the book's 28th printing, January 1961.
In that book I wrote the dates and locations of my sightings as I got into this game. They included a worm-eating warbler supposedly seen in Bemidji in 1963. Well, that was an error by several hundred miles.
Eventually, I crossed out sightings of the worm-eater, the yellow-throated warbler, and Eurasian tree sparrow, among others. I learned they are elsewhere species.
Many of my first sightings came in Massachusetts, while in the Army. I didn't have binoculars then. The identifications I recorded, almost all of them plausible, tend to be of large or distinctly marked species.
American bittern, for instance, or great black-backed gull, barn swallow, black-and-white warbler and chimney swift. I also recorded sharp-tailed grouse in Massachusetts — not plausible.
I checked off three species of warbler, all seen while tiptoeing around brush piles in Ayer, Mass., where we were stationed. My records show a fall-plumaged blackpoll warbler. I doubt it.
I apparently did not see a yellow warbler, though. How didn't I do that?