Search found 1539 matches

by Scully
Tue Jan 03, 2006 5:04 pm
Forum: Purple Martin Forum
Topic: Extreme Birdhouses
Replies: 23
Views: 23039

John.. as yer prob'ly catching on to already, there's bird houses and then again there's bird houses. Each species has specific requirements as to how large the entrance should be and how big the cavity should be. A huge plus is if you can open up the compartments without disturbing the nest too muc...
by Scully
Tue Jan 03, 2006 12:04 pm
Forum: Purple Martin Forum
Topic: Forces Generated by Winds on Gourds
Replies: 10
Views: 7745

Sorry to be gone so long... Hogwild... our tests were run with porches off because they would probably have gotten broken and to level the playing field between gourds. I dunno how much force they would add. John and Linda... Since we were measuring lateral forces, within the weight range of gourd/n...
by Scully
Wed Dec 07, 2005 3:24 pm
Forum: Purple Martin Forum
Topic: Forces Generated by Winds on Gourds
Replies: 10
Views: 7745

Dave... To answer your question... I dunno exactly :???: The force exerted on a gourd by the wind would, of course, increase with the cross-section area of the gourd as presented to the wind. The Big Bo gourd may actually be larger around looking from the top down than it is when viewed from the sid...
by Scully
Wed Dec 07, 2005 12:27 pm
Forum: Purple Martin Forum
Topic: Forces Generated by Winds on Gourds
Replies: 10
Views: 7745

HW... I would encourage you to initiate a colony at your daughter's school as long as you can accept the worst-case scenario. That being you end up doing all the upkeep yourself and that when your children no longer attend that school, the colony may have to be taken down or else end up being neglec...
by Scully
Tue Dec 06, 2005 11:43 pm
Forum: Purple Martin Forum
Topic: Forces Generated by Winds on Gourds
Replies: 10
Views: 7745

HW... The data DOES look good doesn't it :grin: I should reiterate though how we collected the data. Briefly; two runs per gourd type at 70 mph, 50 mph, 30 mph and 10 mph (as indicated on the car speedometer, the actual wind speed varied). The software collecting the force data did not record the da...
by Scully
Tue Dec 06, 2005 10:07 pm
Forum: Purple Martin Forum
Topic: Forces Generated by Winds on Gourds
Replies: 10
Views: 7745

Rich... at this point we haven't tested any poles. Actually we were surprised that the force of the wind acting on the gourds was a small as it was. We weren't sure going into it that our force sensor would have a high enough range to record the data. Based upon that experience I sure would hate to ...
by Scully
Mon Dec 05, 2005 9:21 pm
Forum: Purple Martin Forum
Topic: Forces Generated by Winds on Gourds
Replies: 10
Views: 7745

Forces Generated by Winds on Gourds

A couple of weeks back I posted about our experiment conducted on an airport taxiway where we hauled gourds through the air at various speeds, measuring the wind speed and the lateral force exerted by the gourd on the pole at those wind speeds. Here's a representation of our data. We are very please...
by Scully
Wed Nov 23, 2005 11:46 pm
Forum: Purple Martin Forum
Topic: What gourds look like at 70mph :o)
Replies: 5
Views: 3957

It certainly would be possible to attach a pole and housing to a pickup truck... if I owned a truck too :) Our little Vernier force gauges were meant for classroom physics labs and only read up to 50 Newtons (~11.2 pounds). Prior to the test I drove down a quiet roadway hanging a Natureline gourd ou...
by Scully
Wed Nov 23, 2005 9:29 pm
Forum: Purple Martin Forum
Topic: What gourds look like at 70mph :o)
Replies: 5
Views: 3957

Sandy... it IS a cool project, and fun too :grin: dh... down here in Texas, I would hazard a guess that 70 mph gusts are not that rare in our typically violent May/June thunderstorms associated with frontal activity. In any event perhaps what happens at 70mph is a useful yardstick when considering t...
by Scully
Tue Nov 22, 2005 5:14 pm
Forum: Purple Martin Forum
Topic: What gourds look like at 70mph :o)
Replies: 5
Views: 3957

What gourds look like at 70mph :o)

Pardon me for being gone without notice for a bit, but we have not been idle over here at John Jay :lol: Here's shots of a project underway. We wanted to measure the forces generated by a gourd at different wind velocities with an eye to estimating the load on poles under different conditions. Natur...
by Scully
Mon Aug 22, 2005 7:53 pm
Forum: Purple Martin Forum
Topic: The Corpus Christi Roost: Awestruck by Martins.
Replies: 5
Views: 10654

The Corpus Christi Roost: Awestruck by Martins.

Busy with the hustle and bustle of getting ready for another year at school, I finally got free around 5pm on Saturday, and on impulse my wife and I decided to drive down to the coast to see the Corpus Christi roost described by John and Louise. We departed in some amount of haste, the roost being a...
by Scully
Fri Aug 12, 2005 4:44 pm
Forum: Purple Martin Forum
Topic: R there still Sharpie (Hawks) in Texas - saw one tonight????
Replies: 2
Views: 3526

A Sharpie in July would be unusual. If it was late dusk and you live in Northern San Antonio or Helotes close to the Hill Country one possible explanation would be a Chuck-Will's-Widow. These Whippoorwill relatives are about as big as a pigeon and can look rather hawk-like in flight through the tree...
by Scully
Fri Aug 12, 2005 4:36 pm
Forum: Purple Martin Forum
Topic: Natureline gourd question............do the PM's readily....
Replies: 6
Views: 6031

Here is what we have done with our Naturelines.... We soon abandoned the perched obrounds as starlings entered them freely, although in fairness, we never ran them "as is" without a cling rod or perch of any kind. Next year we will offer just crescent SREH without a rod or perch of any kind on our N...
by Scully
Tue Jul 12, 2005 2:32 pm
Forum: Purple Martin Forum
Topic: Pre-migratory roost--Corpus Christi, Texas
Replies: 2
Views: 4139

Exciting news indeed, my better half and I will be down too...
by Scully
Tue Jul 12, 2005 2:25 pm
Forum: Purple Martin Forum
Topic: Shrike becoming a threat to baby PM's
Replies: 6
Views: 6961

Sandy, we have shrikes around our colony, and it seems preying on birds is a second choice after crickets and such taken on the ground. Last year they preyed heavily on fledgling house sparrows, I didn't see that at all this year or in the years previous. I was not aware of any losses to our colony ...
by Scully
Thu Jul 07, 2005 5:06 pm
Forum: Purple Martin Forum
Topic: Season Wrap-up: Another Banner year for our Naturelines.
Replies: 2
Views: 6952

Sandy... we have been impressed with the WDC entrances. The martins learn them quickly and slip in and out with impressive ease, possibly important if it should give them an extra second to evade a hawk attack. None of our WDC entrances were invaded by starlings, although by random chance eight of t...
by Scully
Thu Jul 07, 2005 3:02 pm
Forum: Purple Martin Forum
Topic: Season Wrap-up: Another Banner year for our Naturelines.
Replies: 2
Views: 6952

Season Wrap-up: Another Banner year for our Naturelines.

The end-of-season silence has descended upon our colony. I had expected nesting activity through the first half of July but two late clutches failed to hatch and a late brood of three has perished, judging by the remains all as undersized twenty-day olds. For the past three years we have been offeri...
by Scully
Thu Jul 07, 2005 2:04 pm
Forum: Purple Martin Forum
Topic: Extreme Makeover at Boone Elementary
Replies: 13
Views: 17110

Katherine, I have indeed been offline for a bit.

We have operated a successful colony at our high school in San Antonio for nine years now.

I would be more than happy to be of any help, now and in future years.

Mike Scully
by Scully
Fri Jun 17, 2005 11:49 am
Forum: Purple Martin Forum
Topic: Purple martin TV: Mission Accomplished!
Replies: 8
Views: 25533

Purple martin TV: Mission Accomplished!

In the spirit of defiance to the sort of people who create and launch worms... some photos....