I started a thread a while back about
Outdoor monitoring for indoor 24/7 listening? with a couple examples of the H1 using an ETM-001 external mic.
As a handheld, the H1 is a noisy recorder. There's a lot of vibration up through the plastic body. The external mic limits the noise but as long as you have the H1 in hand it's still noisy.
When hiking, the H1 works well fixed to a pack strap or in a pouch with the ETM-001 on a lead; taking the mic off the 3.5mm body jack.
I imagine it would work well with a shotgun mic but for me that set up was too much to fiddle with when hiking. Also, your 3.5mm jack limits mic selection, if I remember correctly.
With the ETM-001 on a lead clipped to a pack strap, I can grab it, stick my hand in the direction of the bird, done quickly with no troubles......it serves the purpose.
As a stationary recorder I have no problem with it. I place it under bird boxes, recording all day and I leave it outside recording all night when I have the need.
I often use these all day/night recording, xfr'd to an mp3 player, as a sleep aid. Nothing better than imagining a great hike with sound effects coming through a set of
Goal Zero speakers.
ETM-001 YouTube
Edutige ETM-001
Post #17 comparing ETM-001 to H1 internal mic
H1 YouTube mic links
Full disclosure: I need to brag on
iveljay, he's a wealth of knowledge. Having him walking you through your project is a great asset.