Two Methods:Recognizing Hornet NestsIdentifying a Hornet By SightCommunity Q&A. Belonging to the genus Vespa, hornets are the largest and most aggressive members of the wasp family (Vespidae) with the largest species being as long as 2.2 inches (5.5 cm).
bloom (plural blooms) 1  A blossom; the flower of a plant; an expanded bud. Prescott the rich blooms of the tropics. 2  Flowers, collectively. ( 3 uncountable) The opening of flowers in general; the state of blossoming or of having the flowers open. The cherry trees are in bloom.
Algal bloom. An algal bloom is a rapid increase or accumulation in the population of algae in freshwater or marine water systems, and is recognized by the discoloration in the water from their pigments. Cyanobacteria were mistaken for algae in the past, so cyanobacterial blooms are sometimes also called algal blooms. Blooms which can injure animals or the ecology are called harmful algal blooms, and can lead to fish die-offs, cities cutting off water to residents, or states having to close fisheries.