Date: 09/03/2019

Number: 50

A very interesting roost night.
Blustery winds all day WNW brought new monarchs to Standing Cedars Nature Preserve. There were not the hundreds of a few days earlier, but many dozens. Most of them seemed to be on the western edge, where trees protected them. Clouds moved in about 6:30pm and the roosting occured almost immediately. Most butterflies were roosting by 7:00. And in every case witnessed, they were on the lee side of the tree (facing east), away from the wind.
Temperatures approached 60 degrees by 7:30.
Size of roosts varied from two or three to the biggest of thirteen. Lots of singles, I'm sure.
Trees were varied: oaks, birch, maples......a pine grove probably held monarchs, but i never did spot any there.
North wind predicted for today of 5-10 miles an hour, so we'll probably have a new set of monarchs by this evening.
And our locals should be eclosing today and as the week continues, so perhaps we'll get some roosts from them, too.

Osceola, WI

Latitude: 45.2 Longitude: -92.7

Observed by: Pat
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