Texas mass roost sites

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mbey
Posts: 8
Joined: Fri Jun 28, 2024 3:25 pm
Location: Austin, TX

Hey, y'all, I've been checking NEXRAD II radar to spot the local Austin-metro purple martin roost (looks like it's in Round Rock this year, btw). And I see that there's also signs of a roost in College Station and the San Antonio area. I was wondering if anyone here has put eyes on those other roosts?

Here's the GIF from a couple of days ago. The expanding rings are the radar signature of hundreds of thousands of purple martins leaving their roost as the sun comes up. As it happens, you can also see the millions of bats going back into Bracken Cave in Schertz (just north of San Antonio) as the sun goes up. One shift ending, another begins!

Image
C.C.Martins
Posts: 3368
Joined: Fri Apr 14, 2017 11:15 am
Location: Corpus Christi Tx
Martin Colony History: 2016- Visitors.
2017- 5 pair. 15 fledged
2018- 18 pair. 85 fledged
2019- 17 pair. 81 fledged
2020- 25 pair. 111 fledged
2021- 28 pair. 118 fledged
2022- 33 pair. 151 fledged
2023- 33 pair. 165 fledged
2024- 40 pair. 185 fledged
2025- 40 pair. 181 fledged
HOSP:
Home colony: mix natural, super, Troyer and excluder gourds, enlarged compartment house. All SREH.

Satellite colony: Oso Bay Preserve: 49 PMCA excluder gourds; 16 room Lonestar Goliad with Modified Excluder entrances.
2019: Visitors
2020: 3 pair, 11 fledged
2021: 10 pair, 30 fledged
2022: 11 pair, 35 fledged
2023: 18 pair, 101 fledged
2024: 39 pair, 181 fledged
2025: 51 pair, 216 fledged
PMCA member

Hey! Absolutely stunning radar! Well done!
I'd imagine this will get some folks going to the roosts.
There's two here in corpus ill go visit, one almost entirely of the fledges and the other older birds. Not near as big as those two you found, David Newstead from costal bays and estuaries estimated 30-40 thousand birds. Big enough for me, if there are folks who have never seen a roost, go. I like your plug for Bracken cave...it is just like a bat flight in reverse.
Thanks for sharing, love it!
Tom
A good house sparrow is a dead house sparrow.
HOSP: 17. Starlings: 23
Jones4381
Posts: 830
Joined: Sat Apr 25, 2020 10:54 pm
Location: Southwestern VA
Martin Colony History: 2020- 0
2021- 1 pair-5
2022- 5 pair-20
2023 34 pair-44
2024 30 pair-122
2025 54 Pair -178

C.C.Martins wrote:
Mon Jul 01, 2024 1:04 pm
Hey! Absolutely stunning radar! Well done!
I'd imagine this will get some folks going to the roosts.
There's two here in corpus ill go visit, one almost entirely of the fledges and the other older birds. Not near as big as those two you found, David Newstead from costal bays and estuaries estimated 30-40 thousand birds. Big enough for me, if there are folks who have never seen a roost, go. I like your plug for Bracken cave...it is just like a bat flight in reverse.
Thanks for sharing, love it!
Tom
Hope to one day. I don't see any within 5 hour drive of where I live. The Roost page seems to be pretty outdated from my limited searches in a 6 hour radius here. Maybe one day there will be one a little closer.
"Be content with what you have; rejoice in the way things are. When you realize there is nothing lacking, the whole world belongs to you." - Lao Tzu
mbey
Posts: 8
Joined: Fri Jun 28, 2024 3:25 pm
Location: Austin, TX

Jones4381 wrote:
Mon Jul 01, 2024 3:24 pm
C.C.Martins wrote:
Mon Jul 01, 2024 1:04 pm
Hey! Absolutely stunning radar! Well done!
I'd imagine this will get some folks going to the roosts.
There's two here in corpus ill go visit, one almost entirely of the fledges and the other older birds. Not near as big as those two you found, David Newstead from costal bays and estuaries estimated 30-40 thousand birds. Big enough for me, if there are folks who have never seen a roost, go. I like your plug for Bracken cave...it is just like a bat flight in reverse.
Thanks for sharing, love it!
Tom
Hope to one day. I don't see any within 5 hour drive of where I live. The Roost page seems to be pretty outdated from my limited searches in a 6 hour radius here. Maybe one day there will be one a little closer.
Oh I see, this Roost page?
https://www.purplemartin.org/research/1 ... rtinroost/

There's some helpful info on here. I can't really narrow the roosts down to less than a couple of miles with the setup I'm using.
mbey
Posts: 8
Joined: Fri Jun 28, 2024 3:25 pm
Location: Austin, TX

Jones4381 wrote:
Mon Jul 01, 2024 3:24 pm
Hope to one day. I don't see any within 5 hour drive of where I live. The Roost page seems to be pretty outdated from my limited searches in a 6 hour radius here. Maybe one day there will be one a little closer.
@Jones4381 it looks like you're located in a NEXRAD shadow, too many mountains I guess. But I'll make a note to look into roosts in your area in August. All of my birds will be gone by then, I'll need something to keep myself occupied.
Jones4381
Posts: 830
Joined: Sat Apr 25, 2020 10:54 pm
Location: Southwestern VA
Martin Colony History: 2020- 0
2021- 1 pair-5
2022- 5 pair-20
2023 34 pair-44
2024 30 pair-122
2025 54 Pair -178

mbey wrote:
Mon Jul 01, 2024 4:17 pm
Jones4381 wrote:
Mon Jul 01, 2024 3:24 pm
Hope to one day. I don't see any within 5 hour drive of where I live. The Roost page seems to be pretty outdated from my limited searches in a 6 hour radius here. Maybe one day there will be one a little closer.
@Jones4381 it looks like you're located in a NEXRAD shadow, too many mountains I guess. But I'll make a note to look into roosts in your area in August. All of my birds will be gone by then, I'll need something to keep myself occupied.
Thank you Mbey! Lot's of big ones here in Appalachians, love to here of one in the area.
"Be content with what you have; rejoice in the way things are. When you realize there is nothing lacking, the whole world belongs to you." - Lao Tzu
mbey
Posts: 8
Joined: Fri Jun 28, 2024 3:25 pm
Location: Austin, TX

I scouted out the Round Rock, Texas roost site last night, and they were where a couple years ago, in the roundabout next to Applebees. My phone camera is terrible, but it was a lovely sight:
Image
Jones4381
Posts: 830
Joined: Sat Apr 25, 2020 10:54 pm
Location: Southwestern VA
Martin Colony History: 2020- 0
2021- 1 pair-5
2022- 5 pair-20
2023 34 pair-44
2024 30 pair-122
2025 54 Pair -178

Great photo mbey! That has to be a wonder feeling for all that get to experience it.

I was laughing on your previous reply to me being in the radar shadow here in the mountains. More I thought of it, the phrase, "nice to be off the radar" came to mind...a big smile came over my face...lol.
"Be content with what you have; rejoice in the way things are. When you realize there is nothing lacking, the whole world belongs to you." - Lao Tzu
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