Season's Greetings and Happy Holidays!
Special greetings from the Happy-face Dragonfly:
To help us all get in the Christmas spirit, here's a physics problem from Walker Physics involving Santa:
The situation can be visualized as follows:
And now for the calculation:
Here's a bit of insight into the results:
Ah, nothing like a physics calculation to add to the enjoyment of a day.
Merry Christmas!
Thursday, December 25, 2014
Saturday, December 20, 2014
Friday, December 19, 2014
Thursday, December 18, 2014
Late-Season Dragonfly
Betsy and I visited Cranberry Lake every sunny day this Fall to see if any dragonflies were flying. The last day we saw a dragonfly at Cranberry Lake was Thanksgiving, November 27. On that day we saw two male Autumn Meadowhawks, which set a new record for a late flight date by one day. They were perched in the sun, low to the ground, and the temperature was 55 ˚F. Nice conditions, overall, though it was a bit breezy. One of the meadowhawks flew upward, grabbed a flying insect, and landed to consume it, so they were still quite active.
Here's a photo of a male Autumn Meadowhawk:
This one is perched on the fence near the parking area, a favorite perching spot due to its exposure to the sun.
The weather has been so variable lately. One day when we visited Cranberry Lake there was a fog bank around the shoreline of the island. We decided to go out to Washington Park to see what it was like there. Here's the view at Green Point:
At the top of the loop drive we were above the fog bank, and it was sunny and warm. Here's the view:
Cranberry Lake is in the hills in the distance, above the fog on this day. Birds were active at this lookout point, including a flock of 30 American Robins, 4 Varied Thrushes, and a single (naturally) Townsend's Solitaire.
Here's a photo of a male Autumn Meadowhawk:
This one is perched on the fence near the parking area, a favorite perching spot due to its exposure to the sun.
The weather has been so variable lately. One day when we visited Cranberry Lake there was a fog bank around the shoreline of the island. We decided to go out to Washington Park to see what it was like there. Here's the view at Green Point:
At the top of the loop drive we were above the fog bank, and it was sunny and warm. Here's the view:
Cranberry Lake is in the hills in the distance, above the fog on this day. Birds were active at this lookout point, including a flock of 30 American Robins, 4 Varied Thrushes, and a single (naturally) Townsend's Solitaire.
Wednesday, December 17, 2014
Dragonfly Magazine
The Happy-face Dragonfly was featured recently on the cover of the (fictitious) magazine, Dragonflies. Here it is.
Looks like a good issue. Mr. Happy-face sure gets around!
Looks like a good issue. Mr. Happy-face sure gets around!