Maraming ibon ang umaasa sa tree cavities, o mga butas ng puno, para mapugaran at magpalaki ng kanilang mga sisiw. Ang mga woodpecker, na kilala bilang pangunahing excavator, ay kayang lumikha ng kanilang sariling mga butas. Sa kabilang banda, ang mga non-excavator—tinatawag ding secondary cavity nesters—ay nakadepende sa mga likas o dati nang nahukay na mga butas para sa kanilang reproduksyon. Ang mga ibong ito ay nahaharap sa mga hamon tulad ng kakulangan ng angkop na mga butas, na maaaring maglimita sa paglaki ng kanilang populasyon.

2025 Call for Nominations for the Deanship of the UP Diliman College of Science Schedule of Activities

Many birds rely on tree cavities, or tree holes, for nesting and raising their young. Woodpeckers, known as primary excavators, can create their own cavities. In contrast, non-excavators—also called secondary cavity nesters—depend on naturally occurring or previously excavated cavities for reproduction. These birds face challenges such as a scarcity of suitable cavities, which can limit their population growth. To protect them, it is important to understand the specific nesting needs of each bird species and how they interact with one another. In regions like the Philippines, where forests are vulnerable to change, there is still limited information on how these birds nest and how they are connected.

Scientists from the University of the Philippines – Diliman College of Science (UPD-CS) have developed a new semiconductor structure that could lead to more affordable and reliable terahertz (THz) technology—used in applications ranging from medical imaging to high-speed wireless communication.

3 First-Year Undergraduate Student Slots
- Stipend of Thirty Thousand Pesos (PHP 30,000), with PHP 10,000 to be disbursed during the first month and PHP 5,000 each to be disbursed during the next four months of each semester for four (4) academic years.

Imagine a very thin rubber band morphing into a donut. This transformation, known as the ‘birth of a torus’, is used to mathematically describe the behavior of systems undergoing transitions. While the birth of a torus is common in classical systems, it has only existed theoretically in quantum systems—until now. An international team led by UP physicist Dr. Jayson Cosme has experimentally observed this phenomenon in quantum systems for the first time, using lasers, mirrors, and time crystals.