I admire your love for all things living
I love spiders. But, when they are in a place that threatens humans. something must be done. It is ok, but I appreciate how you feel.
I volunteer at a facility that is open to the public, and I was the black widow specialist. I dispatched them by squishing, when necessary. I wasn't frightened by them. I did wish them well and hoped what is beyond this existence is good for them. We all spend a limited time on this earth.
With egg sacks (found in my garage), I put them in a container and poured boiling water on them. Little environmental impact, and it takes care of the problem.
It is great you care so much. Some of you may think I'm nutty. That is ok. It won't be the first time.
Did your kitten get sick?
Toads excrete a poison that can make animals sick if they lick or pick them up.
We had a dog who went after toads. Picked them up in his mouth, didn't hurt them, dropped them, barfed his guts out all night long, ok in the morning.
Anyone out there remember the LA Law segment on the Australian toads???
Previous poster on keeping black widow in a terrarium. I would do it if it could be done safely. The biology department had one when I was in school. It was really interesting. Just another being trying to make its way on this earth.