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Monarch & Milkweed Survey (moved to 4/17)

10:00a to 11:30a
Wed, April 17, 2024
Sara Rock
(361) 729-2858

Help us conduct a survey for the host plant of the iconic Monarch Butterfly: Milkweed.

Become a citizen scientist by helping us survey for Milkweed and Monarch Butterflies! Join Texas Master Naturalists and a park ranger behind Big Tree, an area normally closed to visitors. We'll search for milkweed and count how many Monarchs we observe to report to citizen scientist projects such as Journey North.

This survey may take you into areas of dense vegetation where you may come into contact with insects, ticks, and possibly snakes. Be sure to dress appropriately.

How to prepare: There are no restroom facilities at Big Tree. The nearest restroom is located at Goose Island Headquarters, about 1 mile from Big Tree. We recommend wearing long sleeves, pants, long socks, hiking boots, a hat, sun protection, and plenty of bug spray. Bring plenty of water as well. 

When: Wednesday, April 17, from 10:00-11:30am (moved from 4/18)
Where to Meet: Big Tree parking lot (on 12th St)
What to Bring: water, bug spray, appropriate clothing (see above)



  • Children must be accompanied by an adult for the duration of the program.
  • Program is free with park entrance ($5/person, children 12 & under are free) or Texas State Parks Annual Pass.
  • Reserving your day pass in advance is strongly encouraged and can be done at Use self-pay station when office is closed.
  • Program may be canceled if no participants are present within 10 minutes of the start time, or in the case of inclement weather.