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Red-tailed Hawk
Big Bird, Little Bird: Size and Identifying Sex of Raptors

As a nature lover hiking through the Marin Headlands, you might be able to quickly identify a couple of raptors flying overhead. At first glance, you also might discern their relative sizes. But what does that tell you about the sex of the raptors?

Staff and volunteers doing stewardship work in Muir Woods.
Muir Woods Earth Day
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Earth Day is celebrated on Aprill 22 each year, but we'll be honoring Earth Day all weekend long! 

Register
Volunteers at Work
Invasive Plant Patrol
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Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required
Habitat Restoration in Tennessee Valley
Habitat Restoration Team
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Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Registration Required
Intern Planting in the Presidio
Presidio Earth Day 2022
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Join us for the Presidio's big, annual volunteer event devoted to celebrating Earth Day!

Register
Volunteers at Work
Invasive Plant Patrol
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Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required
Volunteers at Work
Invasive Plant Patrol
-

Hiking with a mission – help find and remove new infestations of invasive weeds while exploring the parks.

Registration Required
Habitat Restoration in Tennessee Valley
Habitat Restoration Team
- -

Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Registration Required
Habitat Restoration in Tennessee Valley
Habitat Restoration Team

Help restore and protect critical natural areas from the Marin Headlands to Bolinas Ridge.

Registration Required
Crissy Field parkgoers enjoy a nice day flying kites on the grassy lawn.
Crissy Field Kite Day
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Let’s fly a kite together! Join us in celebrating 20 years of Crissy Field on May 7 from 1-3 p.m.  

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