Yes there are there are ticks which suck on your blood. They are related to the leeches and then there are Spiders, tarantulas, for instance, scorpions and mosquitoes.
Insects like caterpillars and grubs are known to harm grass because they feed on it and can leave large patches of dead grass.
Frogs and Spiders
Grub Ex does not kill insects. If you apply it according to the package directions it should get rid of grubs, but not harm helpful insects.
Insects harm trees by leaving their harmful bacteria which can spoil tree's branch or leaves and some insects are also capable in making whole into the tree's branch.Some insects like termite can spoil trees by eating their wooden branches.
Kiwi do not harm any other species except for the insects, larvae and other small animals on which they feeds.
crocodiles do not harm dikkops because they eat insects and make crocodiles more comfort table
They eat pest insects that would harm your garden.
Spiders do not harm plants directly. In fact, they can be beneficial to plants by preying on insects that may damage them.
Minute pirate bugs in bed do not pose any harm to humans. They are beneficial insects that feed on pests like aphids and other small insects.
there prey is small insects and rodents.bird and larger animals can harm them.
my rabbit has eaten bugs on a few rare occasions but it will not do them any harm .:)
The best time to kill bees to minimize harm to the environment and other beneficial insects is in the evening or early morning when bees are less active and most of them are inside the hive.