Tropical rainforest can be divided into several altitude levels, which vary in light conditions and also in the nature of their flora and fauna. In terms of the occurrence of typical groups of butterflies, we can define these levels by their height range and typical butterfly groups that form mimetic (unilateral and reciprocal) protective complexes there, even though numerous other species also live there which do not belong to these complexes. This issue is described based on the example of lowland tropical forests in South and Central America. and George O. Krizek.
Crypsis is the ability of an organism to avoid observation or detection by other organisms, either by predation strategy or antipredator adaptation. Many animals have evolved to visually resemble their surroundings by changing their colour. These changes can be experimentally provoked by altering physical parameters (such as humidity) during the development of the nymphs, and also depend on the type of food they consume. This report illustrates coloration changes of the Green Shield Bug (Palomena prasina) during autumn, on specimens caught at the nearby town of Vlašim (Central Bohemia). We recorded the shortest time for the imagos to change color (from bright green to uniform brown) as nine days in an experimental insecta - rium. The rate of color change was influenced by air temperature. The brown colour is evidently an indicator of the diapause. and Lubomír Hanel, Jana Hanelová.
Three gall midge species displaying remarkable distribution in the Palaearctic region (Lasioptera artemisiae, Dasineura corniculata, Lasioptera eryngii) the causes of which cannot be explained, are discussed. and Václav Skuhravý, Marcela Skuhravá.
The importance of stream corridors and flood deposits for the spreading of molluscs is demonstrated using some examples from the Czech territory. Three types of floodplain debris, which contain shell accumulation, are distinguished: allochtonous debris accumulated by river flow on riversides, autochtonous accumulation in quiet parts of alluvium far from the main flow, and accumulation caused by strong turbulence during flooding. and Vojen Ložek, Lucie Juřičková.
This article describes abandoned old clay pits in the Přelouč district, which became a refuge for several plant and animal species of conservation concern. and Martin Kohoutek, Jiří Rejl.
Ostrov La Gomera je součástí Kanárského souostroví a patří k výjimečným místům ve světovém měřítku. Jde o jeden z nejstarších a nejmenších ostrovů souosroví s velmi pestrou a bohatou endemickou faunou. V článku představíme faunu nosatcovitých brouků (Curculionoidea), kteří nejsou zajímaví pouze svou obrovskou radiací v rámci nik, které využívají, ale také svými životními strategiemi., La Gomera is an island in the Canaries archipelago and an extraordinary location on a worldwide scale. It belongs among the oldest and smallest islands, with highly varied and rich endemic fauna. This article presents the local fauna of weevils (Curculionoidea). These beetles are of interest not only because of their enormous radiation within the niches they inhabit, but also due to their life strategies., and Filip Trnka.