I think people would search for 'help' when their parrot is misbehaving, but 'techniques' when they want to learn how to paint.
Also, beginning/intermediate painters may very well be interested in becoming good enough to sell their work. As such, they might invest in lessons/ebooks, which could garner better conversion rate.
using https://adwords.google.com/select/KeywordToolExternal, 'parrot help' reported 58 searches in february and a search volume of 320.
'oil painting help' was also search 58 times in February, but only had a search volume of 73.
Based on those numbers, I'd assume that the parrot site is a bigger niche and should make more money.