| Comments | Numerous monarchs (50+) observed migrating through during a one hour period prior to sunset. Front passage was on 10/9/99. Dimmit and LaSalle Counties are on a major migration route. Peak migration appears to be mid- to late-October. In past years as many as 3,000+ individuals have been observed roosting in my backyard in Catarina, Texas. They utilized a large salt cedar tree. This particular tree fell in 1998. Monarchs stopped utilizing the immediate area even though there were other large salt cedars near by. |