Here is the ebird bar chart for birds in the entrance road to that reserve (did not find the reserve as a hotspot):
https://ebird.org/barchart?r=L3629943&yr=all&m=
For number 2, do you have a picture where the wings are at rest? it might be necessary to see the shoulder to distinguish between Black-bellied H, Stripe-tailed H and Coppery-headed Emerald (though I do not see a coppery crown).
I still do not have a good idea of No 3: is the inner part of the lower mandible actually red?
Niels